What does it mean that some people “should” get a booster, and some people “may” get a booster?

The expanded recommendations for who should get a booster are based on the latest safety and effectiveness data that show which groups of people are at the most increased risk for severe illness from COVID-19 — people ages 50 and older, and adults living in long-term care settings. Data show that the risk for other adults ages 18 and older may not be as high, and the CDC recommends that people ages 18 and older consider getting a booster based on an assessment of one’s own risks and benefits. If you have questions about getting a COVID-19 booster dose, speak to your health care provider.

Added November 22, 2021