CNN CNN Newsroom With Pamela Brown October 16, 2021 22:53:00
Not really a booster. it turns out this was always a two-dose vaccine. something that we've talked about all year. you know, when we looked at the early phase one, phase-two trial data, it really needed two doses to get consistently high levels of virus neutralizing antibody for everyone. and at that point it was a really, really good vaccine. so there is a subtle difference. with the pfizer vaccine, for instance, there's clear waning, munts, and you need a booster to restore the immunity. with the j&j, the vaccine immunity is staying constant. it's just not at a high enough level. it's around...
Source: archive.org