The Food and Drug Administration’s new standards on Covid-19 vaccine development may dampen Wall Street hopes that a shot to prevent the spread of the pandemic will be available before the U.S. election in November.
With the FDA’s standards for an emergency use authorization not much lower than what’s needed for full approval, the first authorization seems more likely to happen in early 2021, said
The agency’s guidance, published on Tuesday, said any vaccine candidate would need to prove itself at least 50% more effective than a placebo to earn an ...