People think that vaccines are like force fields but it's more like better training and weapons. The vaccine does not affect how many soldiers land on your beac

People think that vaccines are like force fields but it's more like better training and weapons. The vaccine does not affect how many soldiers land on your beaches, they affect how timely and effective your response is. Intramuscular vaccines do not do much to prevent replication of proteins in your nasal cavities, where as nasally adminsitered vaccines do much more so. So by population vaccinating people with intramuscular vaccines, we have reduced harm significantly, but we have not meaningfully affected the virus ability to spread.