experimental vaccine, developed by the National Institutes of Health and Moderna Inc., will really protect. The needed proof: Volunteers won’t know if they’re getting the real shot or a dummy version.
After two doses, scientists will closely track which group experiences more infections as they go about their daily routines, especially in areas where the virus still is spreading unchecked. “Unfortunately for the United States of America, we have plenty of infections right now” to get that answer, NIH’s Dr.
Anthony Fauci recently told The Associated Press.Several other vaccines made by China and by Britain’s Oxford University earlier this month began smaller final-stage tests in Brazil and other hard-hit countries.