A predominantly one-topic blog: how is it that the most imminent and lethal implication for humankind - the fact that the doctrine of "Mutually Assured Destruction" will not work with Iran - is not being discussed in our media? Until it is recognized that MAD is dead, the Iranian threat will be treated as a threat only to Israel and not as the global threat which it in fact is. A blog by Mladen Andrijasevic
Translate
Thursday, April 30, 2020
Nikki Haley: China’s coronavirus actions are just one of many threats it poses
By Nikki Haley
April
30, 2020
Nikki
Haley was the U.S. representative to the United Nations in 2017 and 2018.
“I
tell you it is no use arguing with a Communist. It’s no good trying to convert
a Communist or persuade him.”
— Winston
Churchill
As
the Soviet Union was spreading its control over Eastern Europe following the
Second World War, then-former British prime minister Winston Churchill was
prophetic in his description of what it would take to outlast the Communist
empire without resorting to war.
At
the time, Churchill’s prophesy was unwelcome in the war-weary West. Still,
successive U.S. presidents largely adhered to his advice. The Soviet Communists
were never converted or persuaded. They were defeated, mostly without war, by
superior Western economic, diplomatic and military power, and by a more
determined and inspiring vision of humanity.
Today’s
challenge from the Chinese Communists must be seen the same way.
As in
Churchill’s time, most Americans don’t want to hear about epic threats. We are
weary of perpetual battles with terrorists and the massive dangers and
disruptions associated with today’s pandemic.
But
such threats don’t wait until we are ready for them. Like the pandemic, they
arrive on their own timeline.
With
lies and coverups, China will continue to try to hide its responsibility for
failing to contain a virus that began in Wuhan, is killing hundreds of
thousands worldwide and doing untold economic destruction.
But
deceit about the virus is not the worst danger Chinese Communism poses. It is
just its most glaring symptom. A virus can start in any country. The threats
coming from China do not come from any other country.
In the past month alone, China has
brazenly expanded its reach. In Hong Kong, it has arrested leading
pro-democracy activists and is attempting to criminalize criticism of the
Chinese government. It is increasing its hostile actions in the South China Sea, which
one-third of the world’s shipping passes through. And the State Department has
reported concerns about Chinese nuclear weapons testing in violation of
the Comprehensive Nuclear Test Ban Treaty.
That’s
just the past month. China has a years-long track record of brutality and aggression.
Domestically,
it has vastly enlarged its military capabilities, created an Orwellian
surveillance state and forced more than 1 million of its minority citizens
into “re-education” camps.
Internationally,
it has stolen intellectual property at unprecedented levels, taken over United
Nations agencies such as the World Health Organization, exerted its
leverage over poor countries with terrible debt deals and harassed its Asian
neighbors, none more so than the free people of Taiwan.
The
free world ignores this pattern at our peril.
From
the 1970s through the Obama administration, U.S. leaders from both parties
operated under the theory that as China grew stronger economically, it would
become more free and less aggressive, as had happened in other countries.
However, in the case of China, that theory was disastrously wrong. As it
gathered economic strength, China moved in the opposite direction, becoming
less free and more aggressive.
Why
was China different? Go back to Churchill’s explanation. The Communist Party
thoroughly controls China’s military, commerce, technology and education.
Everything its leaders do is aimed at expanding the party’s power. It is why
they ethnically cleanse minorities. Why they impose a surveillance state. Why
they cannot tolerate freedom in Hong Kong. Why they insist they will take over
Taiwan. Why they claim South China Sea territory that is not theirs. Why they
steal intellectual property. Why they seek to dominate poor countries and
international organizations. Why they expand their nuclear arsenal. China is a
dangerously different power because it is steadfastly committed to a Communist
ideology that views its system as superior and seeks its advancement in every
way.
China
is far from the U.S. homeland. But America’s security depends on preventing
distant powers from amassing enough strength to threaten us. In the past
hundred years, we have stopped Germany twice and the Soviet Union for that
reason. Now we face an expansionist Communist China whose economic power vastly
exceeds anything the Soviets had during the Cold War. It is manifestly in our
security interests to counter this threat.
This
is not America’s challenge alone; free countries must unite to face it. In the
Pacific region, Japan, India and Australia recognize the Chinese danger. Our European
friends have been slower to the cause, but Chinese duplicity on the novel coronavirus is
waking them up. Developing nations that once bought into China’s false
generosity are now seeing through a clearer lens.
Focusing
on China’s reprehensible actions in this pandemic is necessary, but the virus
is just a small part of the threats China poses. The sooner the world
recognizes that, the better prepared it will be to stop it. And as Churchill
noted, preparation is the surest road to peace.
Wednesday, April 29, 2020
People Are Willing to Risk Their Lives for a COVID Vaccine. Should We Let Them?
“The death toll indicates
there’s absolutely a strong ethical case to ask people if they’re willing to do
this.”
There are currently more than
3,900 people willing to be infected with the new coronavirus—if it could mean
developing a vaccine more quickly.
The
volunteers have signed up through the grassroots organization 1 Day Sooner to show their support for
human challenge trials, a kind of study where subjects are intentionally
exposed to a pathogen to see if a treatment works. This differs from a typical
vaccine clinical trial, where people given a new vaccine wait to be infected
naturally—part of the reason why vaccine trials can take years.
While 1 Day Sooner is not affiliated with any
group officially making or studying coronavirus vaccines, more researchers and
lawmakers are speaking out about the potential benefits of doing such trials.
In March, Rutgers University bioethicist Nir Eyal argued in the Journal of Infectious Diseases that human challenge experiments would speed up the
vaccine development process, and last week in Vaccine, Stanley Plotkin,
a vaccine expert at the University of Pennsylvania and Arthur Caplan, a
bioethicist at New York University, outlined how coronavirus challenge trials
could be carried out. Also last week, a bipartisan group of 35 U.S.
Representatives sent a letter to the Food
and Drug Administration (FDA) and Department of Health and Human Services (HHS)
calling for them to support human challenge trials.
There are more than 70 vaccine
candidates right now, but the most optimistic estimates for when a coronavirus
vaccine might be available to the public are between March and August 2021.
We’ve done human challenge studies before for less deadly diseases, like influenza. But the risks of challenge trials are real. In 2001, a 24-year-old woman died in a challenge experiment for an asthma treatment.
Researchers who conduct human challenges have said a COVID-19 trial would be
riskier since there’s so much we still don’t know about it.
“Where you’re going to give somebody a virus on
purpose, you really want to understand the disease so that you know that what
you’re doing is a reasonable risk,” Matthew Memoli, an immunologist at the U.S.
National Institute of Allergy and Infectious Diseases who conducts human
challenge studies of influenza, told Science
Magazine.
The pandemic has already altered or sped up many
of the fundamental processes that guide scientific research, from the reliance on preprint studies that are not peer reviewed to the testing of interventions without clinical trial evidence. Some scientists have
worried that taking these short cuts could lead to greater health risks and confusing data.
VICE spoke to Caplan, the bioethicist and
co-author of the Vaccine paper, about why he thinks human challenge trials are still
worth the risk.
This interview has been edited for length and
clarity.
VICE: There’s been a lot of discussion about the best ways to proceed with research and trials given that we need
solutions as soon as possible, but we also don’t want to put people in danger
or do shoddy science. You and Stanley Plotkin wrote in Vaccine that "extraordinary diseases
require extraordinary solutions." Can you define what you mean by
"extraordinary?" What other situations from the past would you also
classify as extraordinary? We’ve got one of the most highly infectious viruses we’ve ever seen, combined with very serious
fatality, and serious [health consequences] even if you survive it. This is a
public health challenge that the World Health Organization classified as a
"Public Health Emergency of International Concern." When those get
declared, that’s the kind of trigger for me to call something an extraordinary
circumstance.
We have some precedents. Ebola was threatening to become this.
Swine flu, smallpox, yellow fever, polio. These were infectious diseases that
created tremendous health burdens for which we don’t have treatments and for
which there’s nothing that can be done other than behavior modification—
isolation, quarantine, those sorts of things.
What you’re calling for in response to this is a
human volunteer challenge study. Can you describe what makes this different
from a typical vaccine clinical trial?
Normally in vaccine development, you start out in the lab and you find something that seems to attack the virus in a Petri dish—either kill it or stop it from growing, proliferating and invading cells. Then you move on to try it in animals to see if what looks like it might be useful in a dish has any sort of biological impact.
Normally in vaccine development, you start out in the lab and you find something that seems to attack the virus in a Petri dish—either kill it or stop it from growing, proliferating and invading cells. Then you move on to try it in animals to see if what looks like it might be useful in a dish has any sort of biological impact.
Then,
you try it in human volunteers in safety studies. Those are normally just
healthy volunteers and you're looking to see if there's any adverse events at
very low doses—you're not looking for any benefit or protection [from the
virus]. Then you start to escalate up [to] a little bigger dose.
Now you might start to look to see if the vaccination does
anything that seems to trigger any kind of immunity. If all that works, and
you're still pretty sure nothing bad has happened, you go to a big trial for
vaccines. You're looking over time in the vaccinated people, compared to a
group of people who didn't get vaccinated, if they seem to get the disease less
often and, if they get it, does it seem to be less severe?
But you're depending on nature to infect those
people. They just wander around and do whatever they're doing. If they happen
to get infected, then you study to see whether that group is less sick or less
dead than a comparable group. And that can take many, many years. That's why
vaccine development is slow.
The clinical trials that are taking place right now are happening
in this framework?
Yes. The challenge study tries to shorten things in two ways. One,
you may shorten the animal study period and jump into volunteers that are
humans and literally challenge them for safety with doses that you think are
very low, but you haven't really proven it in the animals. That speeds you up
by months.
You're
probably restricting who you try—people that are 20 to 35, because the death
rate is much lower than older people. And obviously you wouldn't do it in kids
because they can't consent to this kind of no-benefit safety exposure.
If
things look okay, instead of waiting for people to get naturally infected,
which may take years to see a significant number of cases, you deliberately
give the disease to people who have been vaccinated to see whether they are
protected.
How would you decide what kind of volunteers for
a human challenge study would be ethical to accept?
First, you need to have competent researchers. Not somebody like Elon Musk or Peter Thiel setting up a vaccine study in a hotel room in Saint Kitts, which has happened. We don't want that. We need to have real, experienced vaccine experts doing this. You have to have people who can make very high-quality doses of the vaccine and the virus itself.
First, you need to have competent researchers. Not somebody like Elon Musk or Peter Thiel setting up a vaccine study in a hotel room in Saint Kitts, which has happened. We don't want that. We need to have real, experienced vaccine experts doing this. You have to have people who can make very high-quality doses of the vaccine and the virus itself.
You need to have a place where you can let people reside so you
can watch them and make sure that, at the first sign of trouble, they get
either medical care or get isolated. You want to have some sort of dedicated
medical research facility.
Then
you want to make sure that the people in the study are actually fit
physiologically. You have to examine them and make sure they don't have any
underlying diseases that might make them more at risk [to the virus]. Then you
want to make sure their consent is sound. You want to make sure that they get
the information about the risks and that they could die.
You need to have the consent done a couple of times to verify it
and have somebody look at it who is there as an advocate for the person [and]
who doesn't care if they sign up or not. I sometimes call it a subject
advocate. We use them in things like living kidney donation to make sure that
the person really wants to do it.
In
addition to written consent, I would make them answer a quiz that shows they
really comprehend what's going on. You want to make sure if you're going to
volunteer for a high-risk study that you really know what's happening, you
understand it's not going to benefit you.
In my view, you probably are not going to pay them
except expenses because you don't want anybody signing up just for money. You
would give them their meals and their housing, but you don't want to
incentivize them to say, “Oh I’ll sign up for this because they’re giving me a
million dollars.” You could offer them compensation for death, which isn't just
to reward their bravery, but also to kind of bring home the fact that you could
die.
It is possible that
somebody could die doing this, and you argue in the paper that people will also
die if the vaccine trials take too long. From an ethical standpoint, how do you
go about making death count comparisons? Is it a difficult rationalization to
make in your mind when either way you’re still talking about human lives?
In this case, it’s not a really difficult calculation. We’ve already seen over 50,000 deaths in the U.S. If we go at the pace that vaccination normally takes, it's probably four to five years to get everything done. We’re presuming the virus rebounds aren’t going to come back less nasty. The [death toll] indicates there's absolutely a strong ethical case to ask people if they're willing to do this. There is a group that formed to see whether people would be willing to do it. It’s called 1DaySooner and they already have over thousands people after just a week of looking.
In this case, it’s not a really difficult calculation. We’ve already seen over 50,000 deaths in the U.S. If we go at the pace that vaccination normally takes, it's probably four to five years to get everything done. We’re presuming the virus rebounds aren’t going to come back less nasty. The [death toll] indicates there's absolutely a strong ethical case to ask people if they're willing to do this. There is a group that formed to see whether people would be willing to do it. It’s called 1DaySooner and they already have over thousands people after just a week of looking.
1DaySooner is a grassroots effort that's not
affiliated with any of the groups or companies developing the vaccines. What do
you think about this initiative coming from the community, instead of experts,
and have you vetted their consent process at all?
I've talked to them loosely. They haven't gotten to the point of developing a consent form, they’re just saying: Would you be willing to do this? This group has been involved with living organ donation, that’s the background of the founder, so they know a little bit about consent and doing risky things to benefit others. But I absolutely think [experts should be involved]. You’d have to really subject this to careful review. I’m not even saying that this is the pool of people you’d use, there may be a whole slew of other people who volunteer.
I've talked to them loosely. They haven't gotten to the point of developing a consent form, they’re just saying: Would you be willing to do this? This group has been involved with living organ donation, that’s the background of the founder, so they know a little bit about consent and doing risky things to benefit others. But I absolutely think [experts should be involved]. You’d have to really subject this to careful review. I’m not even saying that this is the pool of people you’d use, there may be a whole slew of other people who volunteer.
During the pandemic, a lot of the ways we do other kinds of
science have been sped up, or changed. For example, we've been relying a lot on
preprint papers, partly out of necessity. But it means we're not able to go
through the normal peer-review process. We've gotten some really interesting
work out of that, but there have been some problems too—like questions about
the French hydroxychloroquine studies or theSanta Clara antibody study . Are human challenge studies in the same
realm as this? Do you consider it a shortcut that could potentially lead to
some issues?
Challenge
studies have been done in the past—it's not like no one ever did them. Even
Walter Reed’s yellow fever experiments involved infecting Reed and his
coworkers with mosquito bites from mosquitoes known to have yellow fever. There
have been challenge studies for pollution, industrial products, household
products.
What
you’re describing we wouldn’t normally put up with except under extreme
conditions. Challenge studies we have put up with even without extreme
conditions.
In Science,
Alex London and Jonathan Kimmelman wrote a paper titled
"Against Pandemic Research Exceptionalism," where they argued that a
crisis is not an excuse for changing our scientific standards.
And I agree, and point out that these challenge studies are not a change in science. We’re not calling for no consent or no review. We’re not calling to abandon the ethics that have governed research. I don’t think we should run around deliberately injecting people. You wouldn't want to do these studies in poor nations where they might be exploited. But it’s wrong to think that we’ve never done the challenge study work that we have.
And I agree, and point out that these challenge studies are not a change in science. We’re not calling for no consent or no review. We’re not calling to abandon the ethics that have governed research. I don’t think we should run around deliberately injecting people. You wouldn't want to do these studies in poor nations where they might be exploited. But it’s wrong to think that we’ve never done the challenge study work that we have.
I’m seeing a kind of distinction you’re arguing
for, which is that there’s science that's accelerated or rushed, but then what
you're talking about is a study that’s more risky but not necessarily with
lower scientific standards.
Exactly. I think people worry, “Well are they going to go do this to prisoners or poor people?” No. We’re not arguing for any suspension of the ethical rules on how to do experiments. We may be arguing that the risk/benefit facing the world justifies offering the opportunity, but no one would be forced coerced, tricked, exploited.
Exactly. I think people worry, “Well are they going to go do this to prisoners or poor people?” No. We’re not arguing for any suspension of the ethical rules on how to do experiments. We may be arguing that the risk/benefit facing the world justifies offering the opportunity, but no one would be forced coerced, tricked, exploited.
So because a human challenge trial carries
higher risk, the study design and ethical considerations would be more rigorous?
To the highest standard. There’s no way you're going to launch a [human challenge trial] without the absolute best experts agreeing with the design. We can't afford to have muddied results about the only thing that's going to ultimately save us from this plague.
To the highest standard. There’s no way you're going to launch a [human challenge trial] without the absolute best experts agreeing with the design. We can't afford to have muddied results about the only thing that's going to ultimately save us from this plague.
And, as strange as it may seem, the toughest
ethics questions aren't just asking someone to knowledgeably, competently
consent in an informed way. I think we can get that, I'm sure we can get that.
Look at the kinds of work people are already doing: First responders going in
with inadequate equipment and taking the same risk we're talking about. Those
people are out there, we’re calling them heroes.
What I am worried about is that we better figure out that the
science is sound enough that we can get the benefits in a quick enough way
through manufacturing that
we think are worth doing. It may be that you get a wonderful vaccine and it
takes five years to make a million. That's not good. You don't ask people to
take that [infection] risk if you're never able to make the thing in bulk.
The
stakes are too high to chase a number of different vaccines and try to test
them all. We've got to get it right as to which one's the best. Knowing, by the
way, we almost never get anything close to 100 percent efficacy. We’ll have a
decision to make: If you do the challenge study and let's say 60 percent of
people respond. Is that good enough? I'd love to have that problem. But it is a
problem.
Then we’ll have to watch a subsample of people just to make sure
there's no side effects from the vaccine later on. And that we could make this
in big enough quantities that would make a difference.
What
do you make, ethically, of some of the more radical claims that taking risks is
worth it, like the reopening Southern states or the Las Vegas mayor offering her entire city's population as a control group to see what happens when
people don't have social distancing.
If somebody was to offer their city, offer their grandparents, to be experimented on, I think that they should go first. I mean, it’s silly. You don’t volunteer others. You don’t say, “Hey, the people who own the casinos in my town are willing to kill the workforce.” Come on.
If somebody was to offer their city, offer their grandparents, to be experimented on, I think that they should go first. I mean, it’s silly. You don’t volunteer others. You don’t say, “Hey, the people who own the casinos in my town are willing to kill the workforce.” Come on.
That seems like a good ethical baseline: You
don’t volunteer others.
You can’t decide to just let this thing sweep through and knock out the weak. And it’s easier to [suggest] if you’re going to be isolated inside a hotel with pretty good room service or living in a mansion on the outskirts.
You can’t decide to just let this thing sweep through and knock out the weak. And it’s easier to [suggest] if you’re going to be isolated inside a hotel with pretty good room service or living in a mansion on the outskirts.
There
is another situation here which is that, while we're bemoaning stretching the
research in trying to get a fast answer to various antiviral drugs that are
rattling around, we at the same time allow the president to stand up for two
hours every day and direct absolute nonsense at the population with no one
standing there to correct his risk and benefit calculations. Instead we try to
interpret if Tony Fauci is grimacing or Dr. Birx is frowning. In a society that
is willing to tolerate letting
people poison
themselves because they're afraid to take on the president,
arguing about a challenge study seems a bit of a luxury.
Tuesday, April 28, 2020
Marco Rubio: China's threat to U.S. national security is not a game
Two years ago:
If the world’s most powerful country is a dictatorship, a
country that has no respect for privacy, a country that has no respect for free
speech, a country that has no respect for religious liberty of its own people, a
country that has no regard for human rights anywhere in the world. If that is
the most dominant nation on Earth, what do you think the world is going to look
like in 20 or 30 years?
Monday, April 27, 2020
Boris Is Back!
I am sorry I have been away from my desk for much longer than I
would have liked
and I want to
thank everybody who has stepped up
in particular
the First Secretary of State Dominic Raab
who has done
a terrific job
but once
again I want to thank you
the people of
this country
for the sheer
grit and guts
you have
shown and are continuing to show
every day I
know that this virus brings new sadness and mourning to households across the
land
and it
is still true that this is the biggest single challenge this country has faced
since the war
and I in no
way minimise the continuing problems we face
and yet it is
also true that we are making progress
with fewer
hospital admissions
fewer covid
patients in ICU
and real
signs now that we are passing through the peak
and thanks to
your forbearance, your good sense, your altruism, your spirit of community
thanks to our
collective national resolve
we are on the
brink of achieving that first clear mission
to prevent
our national health service from being overwhelmed
in a way that
tragically we have seen elsewhere
and that is
how and why we are now beginning to turn the tide
If this virus
were a physical assailant
an unexpected
and invisible mugger
which I can
tell you from personal experience it is
then this is
the moment when we have begun together to wrestle it to the floor
and so it
follows that this is the moment of opportunity
this is the
moment when we can press home our advantage
it is also
the moment of maximum risk
because I
know that there will be many people looking now at our apparent success
and beginning
to wonder whether now is the time to go easy on those social distancing
measures
and I know
how hard and how stressful it has been to give up
even
temporarily
those ancient
and basic freedoms
not seeing
friends, not seeing loved ones
working from
home, managing the kids
worrying
about your job and your firm
so let me say
directly also to British business
to the
shopkeepers, to the entrepreneurs, to the hospitality sector
to everyone
on whom our economy depends
I understand
your impatience
I share your
anxiety
And I know
that without our private sector
without the
drive and commitment of the wealth creators of this country
there will be
no economy to speak of
there will be
no cash to pay for our public services
no way of
funding our NHS
and yes I can
see the long term consequences of lock down as clearly as anyone
and so yes I
entirely share your urgency
it’s the
government’s urgency
and yet we
must also recognise the risk of a second spike
the risk of
losing control of that virus
and letting
the reproduction rate go back over one
because that
would mean not only a new wave of death and disease but also an economic
disaster
and we would
be forced once again to slam on the brakes across the whole country
and the whole
economy
and reimpose
restrictions in such a way as to do more and lasting damage
and so I know
it is tough
and I want to
get this economy moving as fast as I can
but I refuse
to throw away all the effort and the sacrifice of the British people
and to risk a
second major outbreak and huge loss of life and the overwhelming of the NHS
and I ask you
to contain your impatience because I believe we are coming now to the end of
the first phase of this conflict
and in spite
of all the suffering we have so nearly succeeded
we defied so
many predictions
we did
not run out of ventilators or ICU beds
we did
not allow our NHS to collapse
and on the
contrary we have so far collectively shielded our NHS so that our incredible
doctors and nurses and healthcare staff have been able to shield all of
us
from an
outbreak that would have been far worse
and we
collectively flattened the peak
and so
when we are sure that this first phase is over
and that we
are meeting our five tests
deaths
falling
NHS
protected
rate
of infection down
really
sorting out the challenges of testing and PPE
avoiding a
second peak
then that
will be the time to move on to the second phase
in which we
continue to suppress the disease
and keep the
reproduction rate, the r rate, down,
but begin
gradually to refine the economic and social restrictions
and one
by one to fire up the engines of this vast UK economy
and in
that process difficult judgments will be made
and we simply
cannot spell out now how fast or slow or even when those changes will be made
though
clearly the government will be saying much more about this in the coming days
and I
want to serve notice now that these decisions will be taken with the maximum
possible transparency
and I
want to share all our working and our thinking, my thinking, with you the
British people
and of
course, we will be relying as ever on the science to inform us
as we have
from the beginning
but we will
also be reaching out to build the biggest possible consensus
across
business, across industry, across all parts of our United Kingdom
across party
lines
bringing in
opposition parties as far as we possibly can
because I
think that is no less than what the British people would expect
and I can
tell you now that preparations are under way
and have been
for weeks
to allow us
to win phase two of this fight as I believe we are now on track to prevail in
phase one
and so I say
to you finally if you can keep going in the way that you have kept going so far
if you
can help protect our NHS
to save lives
and if we as
a country can show the same spirit of optimism and energy shown by Captain Tom
Moore
who turns 100
this week
if we
can show the same spirit of unity and determination as we have all shown in the
past six weeks
then I
have absolutely no doubt that
we will beat
it together
we will come
through this all the faster
and the
United Kingdom
will emerge
stronger than ever before
Friday, April 24, 2020
1_DAY_SOONER COVID-19 Human Challenge Trials
1DAYsooner
How could challenge trials help speed up vaccine development?
How could challenge trials help speed up vaccine development?
Excerpts from
The proposed trial method would potentially cut the wait
time for the rollout of an efficacious vaccine. Challenge studies (which always
directly expose all participants to a pathogen to assess efficacy) generally
require fewer participants, followed over a shorter period than do standard
efficacy studies (in which many participants are never exposed). Rollout of an
efficacious vaccine to age groups not included in the challenge studies may
depend on immunological bridging, but this would be a component of the expanded
safety studies discussed above. It is possible that
this process could take several months shorter than reliance on standard phase
3 testing to assess efficacy. While rollout to other populations might
require initial bridging studies, these could be conducted relatively quickly.
It seems clear that, in the absence of an efficacious
vaccine, the global death toll from COVID-19 will be enormous. A recent modelling study suggests that, even with mitigation
strategies focusing on shielding the elderly and slowing but not interrupting transmission,
there may be 20 million this year [10]. If the use of human challenge
helped to make the vaccine available before the epidemic has completely passed,
the savings in human lives could be in the thousands or conceivably millions.
Intense social distancing and related control measures, held in place for many
months between now and the availability of vaccine, will themselves take a toll
on economies, societies, and population health. Advancing the registration and
rollout of an efficacious vaccine, even by a few months, could save many
thousands of lives, and commands enormous societal value.
But a remaining key question, for deeming human challenge studies
ethical, pertains to risk. Are the risks to participants, even when they are
justified by the social importance of the trial and backed by participants’
willful permission, also being kept to the necessary minimum? And do the risks
fall below a postulated cap on the acceptable risk of medical trials, even ones
of the highest social value and with participants’ consent [15]?
The proposed challenge studies seek to contain the risk to participants
in 6 different ways. First, the study will recruit only healthy patients from
age groups in which the risk of severe disease and death following SARS-CoV-2
infection is low. Second, there is the possibility that the vaccine candidate
will protect at least some of those who are vaccinated. Third, in the absence
of an effective vaccine, a high proportion of the general population is likely
to be naturally infected with SARS-CoV-2 at some point [17], including those who might participate in a challenge
study; by volunteering to be artificially infected they may be just hastening
an event that is likely to occur in later months anyhow. Fourth, only people
with an especially high baseline risk of getting exposed during or soon after
the trial period should be recruited (eg, people residing in areas with high
transmission rates). Fifth, participants would be monitored carefully and
frequently following the challenge and afforded the best available care if
needed (eg, guaranteed access to state-of-the-art facilities of the health
system, notwithstanding the possibility of severe shortages of medical care
during the evolving pandemic). Sixth, by the time vaccine candidates are being
tested, some therapeutics may be approved, which may reduce participants’ risk
of morbidity and mortality further. For these 6 reasons, mortality and
morbidity from participation notwithstanding, net mortality and morbidity from participation should
remain low or negative.
Subscribe to:
Posts (Atom)