Intranasal vaccination should probably not be the only or first vaccination. It should be a booster after intramuscular vaccination so we can finally stop the s

Intranasal vaccination should probably not be the only or first vaccination. It should be a booster after intramuscular vaccination so we can finally stop the spread. Additionally, since the epithelium is exposed to the outside world by definition intranasal vaccines are generally much safer and with fewer side effects. The "failures" of Flumist (ie, ~50% efficiency) were later recapitulated by the normal intramuscular tetravalent vaccines when they mis-picked in many times in the mid-2010s (after H1N1 emerged). But for some reason people only remember the one time with Flumist. It's sort of similar to how people remember and think all seagate HDDs are faulty because of the one bad series of drives a decade and a half ago.