Inferno
Registered User
The problems with mumps is that they are 1) highly contagious 2) have a long incubation period before symptoms are visible (giving it more chances to spread) and 3) the vaccination is far from 100% effective. Diseases like mumps and measles are really kept in check by what is known as herd immunity. If enough of the population is immune to the disease, there is no real way for it to spread to infect the non-immune population. However, the US is losing its herd immunity as the percentages of unvaccinated children gets higher and higher, which is why we are seeing mumps, measles, and whooping cough make a comeback.
yep, you can thank Jenny McCarthy for this crap.