Pfizer Covid vaccine was just 12% effective against omicron in kids 5 to 11, study finds, Februry 28 2022:"Pfizer and BioNTech’s two-dose Covid vaccine provided very little protection for children aged 5 to 11 during the wave of omicron infection in New York, according to a study published Monday.

The New York State Department of Health found that the effectiveness of Pfizer’s vaccine against Covid infection plummeted from 68% to 12% for kids in that age group during the omicron surge from Dec. 13 through Jan 24. Protection against hospitalization dropped from 100% to 48% during the same period."
https://www.cnbc.com/2022/02/28/pfizer-covid-vaccine-was-just-12percent-effective-against-omicron-in-kids-5-to-11-study-finds.html

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