It does seem to be true of respiratory viruses though. Asiatic flu is still around, probably HCoV-OC43, now a nearly harmless common cold virus. Spanish flu is

It does seem to be true of respiratory viruses though. Asiatic flu is still around, probably HCoV-OC43, now a nearly harmless common cold virus. Spanish flu is still dangerous like all flus, but not the killer that it was. It would be odd if this is the one, the permanently deadly respiratory virus that just never gives humanity a break, for ever and ever.