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It's been mentioned to me in the discussion on another question that the following proposal has been advanced (in a medical journal):

Controlled human challenge trials of SARS-CoV-2 vaccine candidates could accelerate the testing and potential rollout of efficacious vaccines. By replacing conventional Phase 3 testing of vaccine candidates, such trials may subtract many months from the licensure process, making efficacious vaccines available more quickly. Obviously, challenging volunteers with this live virus risks inducing severe disease and possibly even death. However, we argue that such studies, by accelerating vaccine evaluation, could reduce the global burden of coronavirus-related mortality and morbidity. Volunteers in such studies could autonomously authorize the risks to themselves, and their net risk could be acceptable if participants comprise healthy young adults, who are at relatively low risk of serious disease following natural infection, they have a high baseline risk of natural infection, and during the trial they receive frequent monitoring and, following any infection, the best available care.

(Perhaps even more notably, the lead author of that paper was interviewed at length in Nature on the topic. But no 3rd party reactions to the proposal were included. A somewhat skeptical reaction by a French bioethicist was published by France24 (in French).)

Have any regulatory agencies (FDA or equivalents elsewhere) reacted positively to such a proposal?

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    @GrahamChiu: I've read that article pretty carefully, but I don't see how it's relevant to my question. Drug trials being nowadays conducted in somewhat hush-hush manner in 3rd world countries is one thing (ans somewhat common). I don't see though where they discuss a live Covid-19 challenge for the (African) test subjects in there. (Maybe you are assuming they would do it?) – Fizz Apr 8 at 4:23
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    Yeah, history shows prisoners etc were used for testing. I'd imagine if you were a leader of a very poor country it might seem attractive to you rather than lose millions to the virus – Graham Chiu Apr 8 at 4:30
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    However, there are trials of hydroxychloroquine amongst medical staff to see if it protects them so that's similar but refers to inadvertent exposure – Graham Chiu Apr 8 at 5:22
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    There's now a website looking for volunteers: thecovidchallenge.org - presumably hoping that it would soon be allowed. I've signed up today. – JonathanReez Apr 9 at 2:16

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