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 to go home and take a hot bath. As soon as he was finished bathing, he was to 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 his physician, "but I can cure pneumonia."