In my candid opinion I must say, I don't believe there was any covid19, it was just mere fallacies.it was world politics at it's peak.
Reasons best known to them.

Some say it was to depopulate the world at Large.
Some say it was just to distract Donald Trump.
So he loses focus. Towards governance and election.

I don't want to take this things to be truthful.
I'm still amongst the very few persons on planet Earth that believed there was no covid19, Especially in Africa.

Everything was just POLITICS.