A handful of vaccine candidates using a variety of approaches have reached tests in humans, with a clinical trial of CoroFlu possible by August. No inoculations are expected to be approved for at least a year, but even that would be record speed.

“That is incredibly accelerated when you consider most vaccines have been in development 10 to 15 years before they come to market,” said Dr. Jonathan Temte, a family medicine professor and associate dean at the UW School of Medicine and Public Health.