If you are reading the link in post 60 look again.
Look at MMR possible side effects
Severe Problems (Very Rare)
Serious allergic reaction (less than 1 out of a million doses)
Several other severe problems have been reported after a child gets MMR vaccine, including:
Deafness
Long-term seizures, coma, or lowered consciousness
Permanent brain damage
These are so rare that it is hard to tell whether they are caused by the vaccine.
IOW they aren't certain. Possibly, maybe, who knows for certain? If you had a child who had an adverse reaction would you chance same vaccine with another child? It's a reasonable and serious question. It requires more thinking than a yes because CDC says so.
It is not reasonable or serious to avoid possibly health-saving and life-saving treatments because of risks that are unproven, and even if proven affect below 1 in 1 million treatments. That's called hysteria.
Perhaps you need to read Senator Paul's statements again. He said he knows of "many tragic cases", which is quite unlikely to be true. One way to describe the "Severe Problems" on the CDC website would be "unproven". Even another term to describe them would be "statistically insignificant", especially considering the benefits of wiping out these diseases, which are unfortunately making a comeback thanks to people of influence like Senator Paul making unfounded and debunked claims.
Either way, he obviously has a problem with the truth. I'll be happy to be proven wrong once Senator Paul is able to verify his claims of "many tragic cases" of mental disorders that were proven to be a side affect of vaccination. I'll bet he can't name one.
Also, what I would do if I found my child on the losing end of less than 1 in 1 million odds would not be based on reason or rationality, nor is it a good template for public health policy.
If my child was killed by a falling meteorite while walking down the street, I might be cautious about my other child walking without a helmet, but that wouldn't make it a reasonable or serious reaction.