Today I Learned: "Influenza"

I'm starting a new series of posts, one for every day (until I give up like I do most things)... where I'll post one thing I learned on that day. Hopefully I'll have learned at least one thing a day, though I reserve the right to not learn anything.

I was reading a webpage about the Flu Pandemic of 1918 today (after reading the excellent book Charlotte Sometimes which is partially set in 1918) and I learned that kids used to sing this rhyme while skipping rope:

I had a little bird,
Its name was Enza.
I opened the window,
And in-flu-enza.