Buster dose
Biden received the fourth dose of the vaccine, called on Congress to approve...
March 30, 2022, 22:04 p.m 4
Pfizer is investigating the effectiveness of a new version of the vaccine specifically...
January 25, 2022, 21:51 p.m 7
Society
Buster dose 80 percent effective against more severe forms of Omicron
December 18, 2021, 11:41 p.m 14
