Pfizer is enrolling healthy adults to test a reformulated COVID-19 vaccine that matches the hugely contagious omicron variant, to see how it compares with the original shots.
- Pfizer is enrolling healthy adults to test a reformulated COVID-19 vaccine that matches the hugely contagiousPfizer and its partner BioNTech announced the study on Tuesday.
The original vaccines still offer good protection against severe illness and death. Studies in the U.S. and elsewhere have made clear that adding a booster dose strengthens that protection and improves the chances of avoiding even a milder infection.Tuesday echoes data from Britain and South Africa that omicron infections cause less severe illness — at least in part because so many people have some protection from vaccination or prior infection.
Full study results will take many months as volunteers receive multiple vaccine doses — and as researchers measure how long virus-fighting antibodies remain at high levels after an omicron-adapted dose versus the regular booster.
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