Masks are for whimps. It's just a little flu. He will be fine.
It's not sure he will be fine, as his general health is a bit complicated. I mean, one might remember that Bolsonaro was almost killed, stabbed in the stomach by a radical militant, during the Presidential campaign. Since that day, Bolsonaro has never been in absolutely perfect health. So, the coronavirus might be a real health issue for him. I'd bet he'll take hydrochloroquine and remsdevir (if it's the right spelling, the two anti-Covid medication), and be mildly sick during four or five days.
It was more of a surprise, back then, that Boris Johnson was more seriously hit, more so than for a regular flu. As he seems in strong health, though he admitted being overweight.
Anyway, seems like many people should dash a bit their "hopes": Boris, Bolsonaro or Trump will not be killed by the coronavirus. They're not old or sick enough, to be killed by this.
But of course, the other, "safe" option is, staying tucked at home, trembling in fear, for 6 months, or twelve. Then sure, one doesn't get the virus. But one does not live, either. To each his own.