I recall a teaching colleague singing it 40 years ago, can't remember much of it, it was rude, started like this:-
"Leprosy, all you gave me was, Leprosy,
And V.D, and........."

on the otherhand in the middle of a large dysentery outbreak 25 years ago it could well have been altered to:-

"Dysentry, all you gave me was dysentry"
And gastro enteritis and hepititis".....