well over 100 possible vaccines, in one stage of development or other, that makers hope will work on the novel coronavirus.The first question about any vaccine is: is it safe?
The second: does it work?Recently, a large group of scientists, including 33 Nobel laureates, proposed a simple, but ethically fraught way of answering the second question: give healthy volunteers the trial vaccine, then deliberately try to infect them with coronavirus.It’s called a “human challenge trial,” and while the logic is obvious, the ethical challenges seem equally obvious.The practice “may seem intuitively unethical,” and there is a dark history of “unethical research involving deliberate infection of research subjects,” a World Health Organization.