muhammed ashique

a prominent scientific role. By Allysia Finley Dec. 3, 2021 6:31 pm ET PRINT TEXT 370 ILLUSTRATION: CHAD CROWE Are Covid-19 vaccines a failure? That’s the view in some media quarters amid breakthrough infections and new virus variants. It’s also false. Vaccinated people are more prone to mild infections than public-health authorities initially anticipated. But the shots continue to provide strong protection against serious disease, and the mRNA vaccines in particular—Pfizer/BioNTech’s and Moderna’s—are adaptable to new variants.