Let's begin with an assumption.
Assumption. Coronavirus R0 between 3.8 to 14. Doesn't make that much difference, it would be a global pandemic.
There is 15 days between each generation and each generation has deaths from about 30 days after infection.
We should only be seeing first generation and some second generation deaths now.
Let's also assume that this is an extinction level event.
What would Western authorities do?
If they announce their fear publicly, social order breaks down within 24 hours.
Public order will break down completely anyway.
If they don't announce and discredit anyone that tries to, then they buy time to ensure as much continuity of government as possible.
EVERYTHING now is about CoG.
EVERYTHING.
Beam me up Scotty.