U.S. infectious disease specialist Dr. Anthony Fauci on Wednesday said a variant of the coronavirus first detected in South Africa is 'a bit more complicated' than the UK virus.
U.S. infectious disease specialist Dr. Anthony Fauci on Wednesday said a variant of the coronavirus first detected in South Africa is 'a bit more complicated' than the UK virus.
Johnson & Johnson announced Friday that its single-dose vaccine was 66% effective globally in preventing COVID-19, and 72%..