Who should get pap tests and how often?

All over 21 y/o. Current recommendations state that all women over 21 should be getting pap smears. The frequency depends on the woman's history. Follow your gynecologist's advice on that.
Women. Women 21 - 30 ned a pap test yearly. Over 30, you need them every 3 years as long as you have had 3 normal pap smears in 3 years. If not, you need them yearly for 3 years then every 3 years once they are normal.