US is making its own coronavirus strain for human challenge trials

According to Reuters, US scientists are attempting to manufacture a strain of the novel coronavirus that they could use to intentionally infect participants in human challenge trials. Human challenge trials "are trials in which participants are intentionally challenged with an infectious disease organism," according to the World Health Organization. Even if challenge trials for vaccines become necessary, it could take over a year to set them up. As tens of thousands of Americans continue to test...