The Spanish Flu was in 1918 to 1920 I believe.
World War 2 ended in 1945.
So it lay dormant for decades and then its impact his the beaches at guadalcanal and Normany and magically disappeared taking the war with it?
I dunno. That's quite a stretch.
Nevertheless I betcha millions of the panicky pandemic pumpkina** believe every word and will tell tthat to their children who will tell that to their children who will tell that to their children.
AMAZING. Not in a good way.