Boris Johnson is optimistic about a 'high degree of protection' from COVID-19 vaccines, despite reports on the South African variant.
Boris Johnson is optimistic about a 'high degree of protection' from COVID-19 vaccines, despite reports on the South African variant.
Mexico's president is expected to ask U.S. President Joe Biden to consider having America share its vaccines with its southern..
Pfizer Is Studying the Effects of a Third COVID-19 Vaccine Dose.
Two doses of Pfizer's COVID-19 vaccine
have proven to be..