The 1918 Pandemic had three waves over 18 months.......likely to be the case today as well. Might get a 2021 season. There is a book on the WWI Spanish flu which I read a few years ago. More US solders were killed by the flu than by the German Army. Maybe modern medicine and methods can cut the deaths, but until herd immunity kicks in, everybody is at risk. HERD immunity means more than say 85% of people have had it, and can't transmit it. What is going on is much worse than the public in general perceives.