[TexasGator]

“Autism is not contagious.”

Thank you. BUT polio, measles and other diseases ARE!

[Rennes Templar]

Polio, measles and other “contagious” diseases are self-limiting entities. These are not bubonic plague conditions. At it's peak, polio affected about 50,000. The general impression is that without the vaccines, the virus would have spread throughout the entire population until all were afflicted. Other infections diseases disappeared before vaccines, such as scarlet fever. With proper care and hygiene, they run their course through a population until natural immunity corrects.