Look at the second post. You do NOT understand the research.Actually, all the links are there.
I just wondered how long it would take you to seize the opportunity to jump up & down pointing a finger without researching the data.
How many viral causes of paralysis are known today as opposed to say, 1954?
Do you know?
Regarding the second, you tell me.
Keep in mind that vaccines are not available, and the world population is over 7 billion compared to no more than 2 billion in 1950.
You provide the exact numbers and the sources for those numbers.
Autoimmunization vs immunization--remains a problem for you.