Pfizer starts clinical trial for omicron-specific Covid vaccine

NBC News
NBC News

Cover picture for the articlePfizer and BioNTech announced Tuesday that they have started a clinical trial testing a modified Covid-19 vaccine to protect against the supercontagious omicron variant of the coronavirus. The drugmakers said they aim to enroll up to 1,420 healthy adults ages 18 to 55 in the trial, which will evaluate...

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