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Pfizer vaccine less effective against omicron, new data shows
New Data Shows Pfizer COVID Vaccine Effective Against Omicron Variant
New study shows three doses of Pfizer vaccine less effective against omicron
Fauci: New Omicron data strong argument for getting boosters
Pfizer says vaccine for children 5-11 less effective during omicron surge
Pfizer says early data shows COVID booster appears to offer omicron protection
Pfizer Vaccine Effectiveness Against Omicron Down To 12% in Kids 5-11 | New York Data
Study: Pfizer COVID-19 vaccine did not protect younger children well from Omicron
COVID-19: Pfizer jab '40 times less effective' against Omicron
Pfizer says early data shows COVID booster appears to offer omicron protection
Pfizer Vaccine Provides Less Immunity to Omicron Variant
Pfizer CEO: New Data On Booster Effectiveness Against Omicron Is ‘Very Good News’
