A man went to see his doctor because

he was suffering from a miserable cold. His doctor prescribed some

pills, but they didn’t help.

On his next visit the doctor
gave him a shot, but that didn’t do any
good.

On his third
visit the doctor told the man, “Go home and take a hot
bath. As soon
as you finish bathing throw open all the windows and stand
in the
draft.”

“But doc,” protested the patient, “if I do that, I’ll
get
pneumonia.”

“I know,” said the doctor, “I can cure
pneumonia.”