Pfizer begins testing omicron-matched COVID shots in adults
(AP) - Pfizer and BioNTech have begun studying a COVID-19 vaccine tweaked to match to the omicron variant in healthy adults. |!| Juneau
(AP) - Pfizer and BioNTech have begun studying a COVID-19 vaccine tweaked to match to the omicron variant in healthy adults. |!| Juneau