Moderna's vaccine put to final test in thousands of volunteers

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.

Moderna said the vaccination was done in Savannah, Georgia, the first site to get underway among more than seven dozen trial sites scattered around the country.