[fratty12345]

herd immunity is a double edged sword though, having people immune to a specific disease does make you less likely to catch it. but because of herd immunity, you never encountered the disease, thus when you do get it, usually later in life, its usually more dangerous for you to have the disease, as symptoms tend to be more severe,possibly deadly. to give an example, MUMPS,RUBELLA, ditpheria, measles, are much more dangerous than when there was little to no vaccinations to it, adults are the highest risk of death from it, while children usually have mild symptoms. Chickenpox is one of those disease you get as a kid, and possible shingles later in life, but with vaccination, now adults are getting its severe and can be deadly, and shingles is becoming more common in young people.