Up until the time that smallpox was declared irradicated, I was probably vaccinated somewhere between 8 and 12 times. Every person whoever served in the military was vaccinated. School children were vaccinated. Millions were!
I can't say there was not that one in a million incident where someone fell ill or maybe even there was a death. But I have never heard of it.
Smallpox doesn't kill everyone. It seems only about thirty percent actually die from it. The rest are usually disfigured. Older people and those with weak immune systems are at more risk.
As for me, I have told my doctor that I will be first in line as soon as the CDC gets off their butts and allows Americans the protect they need.
The choice is yours.