It appears Mr Azar has been misinformed.
"This is an essential building block that is needed to move forward with the trials that could actually determine whether the vaccine does protect against infection," said Dr. Lisa Jackson of the Kaiser Permanente Washington Research Institute in Seattle, who led the study.
There's no guarantee but the government hopes to have results around the end of the year — record-setting speed for developing a vaccine.
He called the early results "a good first step," and is optimistic that final testing could deliver answers about whether it's really safe and effective by the beginning of next year.
"It would be wonderful. But that assumes everything's working right on schedule," Schaffner cautioned.
And Tuesday's results only included younger adults. The first-step testing later was expanded to include dozens of older adults, the age group most at risk from COVID-19. Those results aren't public yet but regulators are evaluating them, and Fauci said final testing will include older adults, as well as people with chronic health conditions that make them more vulnerable to the virus — and Black and Latino populations likewise affected.
Moderna's coronavirus vaccine ready to advance to final phase of testing