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, “but I can cure pneumonia.”