Categories
RT @WHO: Dr @Kate_L_OBrien explains what we know so far about #COVID19 vaccine "booster" shots, and why making sure at-risk
RT @WHO: Dr @Kate_L_OBrien explains what we know so far about #COVID19 vaccine "booster" shots, and why making sure at-risk people 𝙚𝙫𝙚𝙧𝙮𝙬𝙝…