@NJoIdaR @TrumpUndead @jonathanchait Flu shots are vaccines, and have always been vaccines. 'Influenza vaccine' is the official name, mostly in the form of an inactivated virus, a form of vaccine. Always has been. Flu shot is a casual term.
@NJoIdaR @TrumpUndead @jonathanchait 流感疫苗是疫苗，而且一直是疫苗。 “流感疫苗”是官方名称，主要是灭活病毒的形式，是疫苗的一种形式。一直都是。流感疫苗是一个随意的术语。