Based if true

So why did it take so long to spread? This a lot more contagious than the flu

It mutated between then to become the contagious virus we now know.

And it appears to mutated less deadly now. In that aircraft carrier everyone were tested 60% were asymptomatic and only 1% needed hospitalization

>And it appears to mutated less deadly now
Possible. There's a few strains of the virus out there atm. It could in part explain why mortality rates vary so greatly.