Can someone who has been quarantined for COVID-19 spread the illness to others?

Quarantine means separating a person or group of people who have been exposed to a contagious disease but have not developed illness (symptoms) from others who have not been exposed, in order to prevent the possible spread of that disease. Quarantine is usually established for the incubation period of the communicable disease, which is the span of time during which people have developed illness after exposure. For COVID-19, the period of quarantine is 14 days from the last date of exposure, because 14 days is the longest incubation period seen for similar coronaviruses. Someone who has been released from COVID-19 quarantine is not considered a risk for spreading the virus to others because they have not developed illness during the incubation period.

Show All Answers

1. What is a novel coronavirus?
2. Why is the disease being called coronavirus disease 2019, COVID-19?
3. What is the name of the virus causing the outbreak of coronavirus disease?
4. Is SARS-CoV-2 (the virus causing COVID-19) the same as the MERS-CoV or SARS-CoV?
5. What is the source of the virus?
6. Can someone who has had COVID-19 spread the illness to others?
7. Can someone who has been quarantined for COVID-19 spread the illness to others?
8. Can the virus that causes COVID-19 be spread through food, including refrigerated or frozen food?
9. Will warm weather stop the outbreak of COVID-19?
10. What is community spread?
11. Am I at risk for COVID-19 in the United States?
12. Has anyone in the United States gotten infected?
13. How can I help protect myself?
14. Does CDC recommend the use of facemask to prevent COVID-19?
15. What should I do if I had close contact with someone who has COVID-19?
16. Am I at risk for COVID-19 from a package or products shipping from China?
17. What are the symptoms and complications that COVID-19 can cause?
18. Should I be tested for COVID-19?
19. How do you test a person for COVID-19?
20. Can a person test negative and later test positive for COVID-19?