US to launch 'overwhelming' COVID-19 vaccine campaign by November
The official cautioned that there is still uncertainty around the timing of when a vaccine will actually be available.
A nurse holds China's SinoVac coronavirus potential vaccine for trials before administering it to a volunteer at Emilio Ribas Institute in Sao Paulo, Brazil July 30, 2020. (photo credit: REUTERS/AMANDA PEROBELLI)ByREUTERS
