Pfizer Says COVID Booster Offers Protection Against Omicron

FILE - Dr. Manjul Shukla transfers Pfizer COVID-19 vaccine into a syringe, Thursday, Dec. 2, 2021, at a mobile vaccination clinic in Worcester, Mass. Pfizer said Wednesday, Dec. 8, 2021, that a booster dose of its COVID-19 vaccine may protect against the new omicron variant even though the initial two doses appear significantly less effective. (AP Photo/Steven Senne, File)

Pfizer says a booster dose of its COVID-19 vaccine appears to offer important protection against the new omicron variant. Pfizer and its partner BioNTech tested how well vaccine-produced antibodies could neutralize omicron in lab dishes. They found significant weakening after the standard two doses. But a booster dose increased antibody levels by 25-fold. The companies said two doses still may protect against severe illness, but they are working to develop an omicon-specific vaccine in case it’s needed. They announced the findings Wednesday in a press release. The data is preliminary and hasn’t undergone scientific review.


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