What to do after exposure to COVID-19
Quarantine - COVID-19
When to Quarantine
You should quarantine at home if you have had close contact with someone with COVID-19 and:
- You are unvaccinated
- You have not had all the recommended COVID-19 vaccines plus a booster
You DO NOT need to quarantine after exposure to someone with COVID-19 if:
- You have received all recommended COVID-19 vaccines plus a booster shot.
- You have tested positive for COVID-19 within the past 3 months and recovered, as long as you do not develop new symptoms.
- You should watch for symptoms of COVID-19 for 10 days after contact with someone with COVID-19. If you develop symptoms of COVID-19, follow recommendations for isolating at home.
If you need to quarantine, you should:
- Stay at home for at least 5 days after your last contact with someone who has COVID-19. The date of exposure is day 0.
- You should wear a well-fitting mask or respirator that fits well over your nose and mouth without gaps around others at home and try to stay away from others in your home as much as possible for a total of 10 days after exposure.
- Avoid travel for 10 days after exposure to someone with COVID-19.
- Watch for symptoms of COVID-19 (such as fever [100.4 degrees Fahrenheit], cough, shortness of breath).
- If you develop symptoms, get tested and isolate until you receive your results. If you test positive, follow recommendations for isolating at home.
- If you do not develop symptoms, get tested 5 days after you last had close contact with someone with COVID-19.
- If you test negative, you can leave your home, but continue to wear a mask around others at home and in public for 5 more days (10 days total).
- If you test positive for COVID-19, follow recommendations for isolating at home.
When to Call the Doctor
You should contact your health care provider:
- If you have symptoms and think you may have been exposed to COVID-19
- If you have COVID-19 and your symptoms are getting worse
Call 911 or your local emergency number if you have:
- Trouble breathing
- Chest pain or pressure
- Confusion or inability to wake up
- Blue lips or face
- Any other symptoms that are severe or concern you
Centers for Disease Control and Prevention website. COVID-19: Travel.
Centers for Disease Control and Prevention website. COVID-19: Quarantine and isolation.
Last reviewed on: 3/15/2022
Reviewed by: David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.