Name: Pfizer releases new data about effectiveness of its booster against omicron
Uploaded: Wed Dec 08 2021 12:12:57 GMT+0000 (UTC)
Duration: 1 min 53 s
Description: As more is learned about the omicron variant, early indications suggest it may produce milder infections than the dominant delta strain. Meantime, Pfizer is out with new data on the effectiveness of its vaccine against it. NBC’s Sam Brock reports for TODAY.

Dec. 8, 202101:53