In this July 27, 2020, file photo, Nurse Kathe Olmstead prepares a shot that is part of a possi …

In this July 27, 2020, file photo, Nurse Kathe Olmstead prepares a shot that is part of a possible COVID-19 vaccine, developed by the National Institutes of Health and Moderna Inc., in Binghamton, N.Y. (AP Photo/Hans Pennink, File)