KPIX CBS Evening News With Norah ODonnell September 16, 2021 01:38:00
Intensifying battle over booster shots. >> reporter: tonight, pfizer and now moderna are making a major push for booster shots, but the food and drug administration is staying neutral. today, the f.d.a. released new documents from pfizer ahead of an advisory panel's meeting on friday to discuss covid booster shots, claiming that protection from its vaccine loses some effectiveness after six months, but improves to 95% after a third dose. but in a separate document, f.d.a. staff noted that they've yet to verify some data that would support an additional dose, saying the current vaccines still a...