The only people who are currently recommended should take a booster are those who are 65 years and older, 50 years and older with underlying medical conditions, 18 years and older living in long-term care settings. You may also get a booster shot based one individual benefits and risks such as 18-49 year olds with certain medical conditions like heart disease and diabetes or 18-64 year olds at increased risk of exposure because of where they work.