Pfizer opens study of COVID shots updated to match omicron

Pfizer has begun a study comparing its original COVID-19 vaccine with doses specially tweaked to match the omicron variant Virus Outbreak Massachusetts Pfizer has begun a study comparing its original COVID-19 vaccine with doses specially tweaked to match the hugely contagious omicron variant. Pfizer and its partner BioNTech announced the study on Tuesday. COVID-19 vaccine...

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BioNTech Kathrin Jansen Massachusetts Pfizer U.S.