KNTV NBC Nightly News With Lester Holt August 26, 2021 01:39:00
Moderna vaccines keith alberts admits hes been concerned. >> i feel a whole lot better i feel like this is what ive been waiting for. ive been waiting to hear this. there was nothing ever mentioned about a booster for johnson. it was all pfizer and moderna. >> reporter: with the delta variant spreading fast, the biden administration is eager to offer boosters six to eight months after americans are fully vaccinated starting next month. but is it safe to mix boosters giving a pfizer or moderna bo...
Source: archive.org