It’s the same as how you win in Plague Inc — you want a virus that isn’t very lethal, has a long incubation period, and causes mild symptoms in most people. Th

It’s the same as how you win in Plague Inc — you want a virus that isn’t very lethal, has a long incubation period, and causes mild symptoms in most people. That gives your virus time and opportunity to spread. Fast lethality means the host dies before you spread. Strong symptoms means the host stays home and you don’t spread. Covid19 hit the sweet spot. Asymptomatic for many days, barely noticeable symptoms in 70%+ of the population, then suddenly very deadly in the few percent that get bad enough.