Flu has a long track record in causing pandemics with new variants, e.g., the Spanish flu in 1918–1920. Outbreaks spread much faster now thanks to air travel. W

Flu has a long track record in causing pandemics with new variants, e.g., the Spanish flu in 1918–1920. Outbreaks spread much faster now thanks to air travel. We do have the advantages of P2 masks and mRNA vaccines.