Pfizer begins study of Covid jabs updated to match Omicron variant

Pfizer begins study of Covid jabs updated to match Omicron variant
(Yui Mok/PA)

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.

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