If potential disasters were actively getting stopped, they'd be documented.
I think it's just that nobody has both the ability and desire to destroy the world at the same time. Do we even know if smallpox would kill a modern human?
I think it's just that nobody has both the ability and desire to destroy the world at the same time. Do we even know if smallpox would kill a modern human?
The last person to die of smallpox died in my lifetime. I hope I'm not so old that I'm no longer considered a "modern human".
Plus, effective heard immunity requires something north of 85% of the population. Smallpox vaccination rates are not even 50%.