By the way, if you look at CDC and WHO data and other historical data, most
infectious diseases that we now vaccinate for were ALREADY on the decrease
due to natural immunity of the population. There was a little blip of
polio in 1948 in the UK due to hygiene problems in the cities post-WW2 but
then was starting to go back down again. THe decrease in disease incidence
was already occurring before the advent of vaccinations. Check your
history if you doubt.
Kim Henneman,DVM