COVID-19 Vaccine Boosters for Those With Underlying Medical Conditions

COVID-19 vaccines continue to be highly effective at preventing severe illness, hospitalization, and death due to COVID-19, including from the Delta variant. But protection appears to decrease over time, and people with underlying medical conditions are at increased risk of severe illness from COVID-19. As a result, some people are now eligible for a booster shot.

Who Is Eligible for a Booster

You’re eligible to get a booster shot if:

  • It's been at least 6 months since you got the second dose of a Pfizer-BioTech or Moderna vaccine;
  • You're at least 18 years old; and 

  • You're at increased risk for severe COVID-19 because of an underlying medical condition. 

Such conditions include:

  • Cancer
  • Chronic kidney disease
  • Chronic lung diseases, including COPD (chronic obstructive pulmonary disease), asthma, interstitial lung disease, cystic fibrosis, and pulmonary hypertension
  • Dementia or other neurological conditions
  • Type 1 or 2 diabetes
  • Down syndrome
  • Heart conditions, such as heart failure, coronary artery disease, cardiomyopathies or hypertension
  • HIV infection
  • Liver disease
  • Overweight and obesity
  • Pregnancy
  • Sickle cell disease or thalassemia
  • Smoking, current or former
  • Solid organ or blood stem cell transplant
  • Stroke or cerebrovascular disease, which affects blood flow to the brain
  • Substance use disorders

If you have a condition that is not listed above, your health care provider can help you decide if a booster is right for you.

CDC recommends that all individuals who are at least 18 years old and who got Johnson & Johnson’s Janssen vaccine—regardless of whether you have an underlying medical condition—get a booster at least 2 months after your first dose.

If you're eligible for a booster, you may choose which vaccine to receive as a booster dose. Your booster shot doesn't have to be the same vaccine you received before. 

For more information about boosters, or if you have questions about your eligibility, visit cdc.gov/coronavirus or talk to a health care provider. 

How to Find Vaccines

You have three ways to find vaccines near you:

  • Go to vaccines.gov
  • Text your ZIP code to 438829
  • Call 1-800-232-0233