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Pfizer study suggests vaccine works against new virus variant - NBC
Pfizer Study Shows Booster Shot Protects Against Covid-19 Omicron Variant
Pfizer Study Suggests COVID-19 Vaccine Works Again Mutation
Covid -19 | Pfizer Study Suggests Vaccine Works Against New UK Virus Strain
Pfizer Vaccine Can Work Against Omicron Variant, CEO Says
COVID-19: Study finds Pfizer vaccine effective against new strains
Pfizer's COVID-19 Vaccine Highly Effective: Study
New Data Shows Pfizer’s Covid Vaccine For Kids 5 To 11 Offers Little Protection
Pfizer Says Covid Vaccine Is 100 Percent Effective In Children Ages 12-15 | NBC Nightly News
Children Begin Receiving Pfizer’s Covid Vaccine | NBC Nightly News
Israel Opens Up as Study Shows Pfizer Vaccine Works
What to Make of Pfizer's Data Suggesting Vaccine Can Stop Asymptomatic Disease | NBC10 Philadelphia