SARS-COV2 has a very clear transmission profile, and it spreads quickly, with the corresponding hospitalizations and deaths, until you find a way to stop or slow the spread. It does not just go away by itself. CV19 isn’t something that is “overlooked” for long.
Not true. It has been shown that between 20% (Wuhan)-50% (cruise ships) of all infected people are asymptomatic.