Source please?
Cant find answer to this obvious question:
Viral epidemics and pandemics die out. Why? Why dont they just sicken everyone that comes into contact? What stops propagation?
Yes I know they are fast-evolving, but those that successfully reproduce by definition propagate. Theres a reason the Spanish Flu died out, why didnt it kill everyone? Why isnt it still killing? Wouldnt survivability make the the most prolific virus the one that survives rather than the one withdevolved genetic material?