Yes, I took the polio, smallpox, chickenpox, and the shots when I was 5 years old, maybe 4. And I thank that for being alive today.
Doesn't mean it doesn't kill the elderly or the sick.
To sacrifice a few for the good of the many is a choice we all have to examine very closely. At what price?
Another stupid scientist thing...... There is a MarineMammalCenter here in MarinCountiesFt.CronkiteBeach. Every year, they take in stray, lost, injured, or abandoned baby seals, nurse them to health, TAG THEM, then release them back to the ocean. Guess what? Fully NINETY percent of them die within a year, or need human care. Why is that, I ask you?