These people should get tested for COVID-19:
Anyone who has had close contact with someone who tested positive for COVID-19.
If you are not fully vaccinated, you should get tested immediately and, if negative, three to five days after the last time you were close to a person with COVID-19.
If you are fully vaccinated, you should get tested three to five days after you were close to a person with COVID-19.
Whether you are vaccinated or unvaccinated, if you start to have any symptoms, get tested again.
If you have tested positive for COVID-19 within the past three months and do not feel sick, you do not need to get tested after close contact with a person with COVID-19.
Visit Close Contacts and Tracing for more information about what to do if you have had close contact with someone with COVID-19, including quarantine.
You should also follow Recommendations for Wearing Masks.
Anyone traveling or returning from travel.
Travel within the United States
If you are not fully vaccinated, CDC recommends getting tested one to three days prior to domestic travel, and three to five days after returning home.
Visit CDC: Domestic Travel During COVID-19 for more information on travel, including prevention guidance and when to quarantine.
If you are not fully vaccinated, CDC recommends that you do not travel internationally. However, if you do travel internationally, you should get tested one to three days prior to travel, and three to five days after you return home. Some international locations may also require vaccinated people to test. Check the requirements of your travel destination.
Everyone boarding a flight to the United States must have a negative COVID-19 test within three days of the flight or documentation of COVID-19 in the prior three months.
Even if you are fully vaccinated, you should still get tested three to five days after you return home from international travel.
Health care workers are recommended to test after domestic and international travel and after a high-risk exposure, even if fully vaccinated, due to the vulnerable population they serve. People who work in a health care setting should refer to COVID-19 Recommendations for Health Care Workers (PDF).
Anyone who has attended a high-risk event.
An example of a high-risk event is a large gathering or event where people are not wearing masks and are not able to stay 6 feet apart.
Whether or not you are fully vaccinated, you should get tested three to five days after the high-risk event, especially if you may have come in close contact with someone who has COVID-19.
If you develop any symptoms, get tested right away.