The so-called "Spanish Flu" of 1918 had origins in a migratory bird route over large tracts of pig stockyards, and the workers and nearby army base residents were subsequently infected and subsequently brought it over to Europe at the end of WW1.
Given both points above, shame on USATODAY for giving the time of day to such dangerous speculation while much of the planet chafes under lockdown and is irritable and hating on China anyway... shameful demagoguery. Dismissed.