Well, coronavirus and the disease Covid-19 are real enough, and I don't think
alittlelark's father denies that (hey
alittlelark, learn how to use apostrophes!). What he seems to be saying is that for the vast majority of people it's like the flu. That seems to be approximately correct. Like the flu, Covid-19 seems to be particularly dangerous for people in poor health (elderly people so far, but many homeless people have depressed immune systems, and cancer patients doing chemo or radiation do as well).
Judging from the father having the energy to be cranky - bless him!
- he'll probably do well. Maybe his politics don't need panic, hysteria, and people dying.