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A dose of a Pfizer COVID-19 vaccine is prepared at Lurie Childrens hospital in Chicago. (AP/Nam Y. Huh, File)

Booster shots needed against omicron, CDC studies show

Three shots of Pfizer, Moderna jabs were about 67% effective against omicron-related symptomatic disease compared with...

22 Jan 2022 11:08 AM IST

A doctor loads a dose of Pfizer COVID-19 vaccine into a syringe at a mobile vaccination clinic in Worcester, Massachusetts (AP Photo/Steven Senne, File)

US urges COVID boosters starting at age 12 to fight Omicron

Studies show a booster dose at least temporarily revs up antibodies to levels that offer the best chance at avoiding...

6 Jan 2022 12:43 PM IST