Since the early days of the coronavirus pandemic, some researchers have advocated a fast but controversial way to determine whether a COVID-19 vaccine works, intentionally attempt to infect vaccinated volunteers with the virus. In July, a vaccine advocacy group called "1 Day Sooner" published an open letter to the director of the United States National Institutes of Health, urging regulators to allow "human challenge" vaccine trials. In these trials, volunteers would be injected with potential vaccines and then would be "challenged" by being intentionally exposed to COVID-19. 15 Nobel laureates, more than 50 professional philosophers, and many other prominent intellectuals have signed the letter. 30,000 people from 140 countries have volunteered. But there are those who disagree, like Dr Anthony Fauci, and call it unethical especially since we don't know the full extent of the impact of Covid and there is no cure for it.