Well at least the spanish flue pandemic helped end ww2
View: https://mobile.twitter.com/BorisJohnson_MP/status/1293072891114921985
The governments greatly helped the pandemic, with their propaganda to recruit citizens as soldiers (where the virus broke out), then ship them over the ocean to fight the war for governments (spread the virus), putting them in trenches in misery, weakened people easy victims for the virus, and with their media ban to not publish the pandemic - the Morale of the troops was of utter importance. The "Spanish" of spanish flu origins there: Spain was neutral, - media was not censored there and the public got finally informed.