The Future of Immunity

If there is a variant that the current vaccines would not protect us against, there's a very real prospect of companies like Pfizer and Moderna being able to create a new vaccine. So I think my reading of the evidence is that we're probably going to be in a world where we need an annual booster shot. We don't know whether these vaccines can provide what they call sterilizing immunity that is permanent for it like the chicken box or something like just permanent immunity forever.