A man went to see his doctor because he was suffering from a miserable cold.
His doctor prescribed some pills, but they didnâ€™t help.
On his next visit the doctor gave him a shot, but that didnâ€™t do any good.
On his third visit the doctor told the man, â€œGo home and take a hot bath. As soon as you finish bathing, throw open all the windows and stand in the draft.â€
â€œBut doc,â€ protested the patient, â€œif I do that Iâ€™ll get pneumonia.â€
â€œI know,â€ said the doctor, â€œbut I can cure pneumonia.â€