It's a really funny dark humour gag. Like most jokes at other people's expenses, particularly poorly people, it's not quite so funny anymore if you or your own loved ones are the ones being affected.
I found it ill advised coming from the Prime Minister of the country whom are losing thousands of people to this virus. But it's a good measure of the hold he has over people when he, on here, largely got a pass on the original joke but people are humping someone who re-posted the joke. It's pretty weird.