COVID-19 is a respiratory disease, caused by a novel (or new) coronavirus that emerged in late 2019. Reported illness ranges from mild symptoms to severe illness and death for confirmed COVID-19 cases.
Symptoms of infection may appear 2-14 days after exposure to the virus and may include:
- Fever or chills
- Shortness of breath or difficulty breathing
- Muscle or body aches
- New loss of sense of taste or smell
- Sore throat
- Congestion or runny nose
- Nausea or vomiting
- In elderly, chronically ill, or debilitated individuals such as residents of a long-term care facility, symptoms of COVID-19 may be subtle such as alterations in mental status or in blood glucose control
However, it’s possible for people with COVID-19 to spread the virus to others up to 48 hours before they have symptoms. Visit the CDC's resource on symptoms for more information.
If you develop symptoms of COVID-19, even if they are mild, please contact your healthcare provider. Visit COVID-19 Testing to learn more about testing options.
You can also call 2-1-1 to learn more about COVID-19 prevention, symptoms, and treatment. Mass 2-1-1 is a hotline available 24 hours a day, 7 days a week. All calls are free and confidential. Interpreter services are available in multiple languages.
Coronaviruses are a large group of viruses; some cause illness in people and some occur in animals, including camels, civet cats and bats. Rarely, animal coronaviruses can evolve and infect people and then may spread between people. Human coronaviruses cause routine seasonal respiratory virus infections. Other coronaviruses, like SARS and MERS, can cause serious illnesses.
How do coronaviruses spread?
Coronaviruses are respiratory viruses and are most commonly spread through respiratory secretions (droplets from coughs and sneezes) of an infected person to another person in close proximity (within about 6 feet). CDC describes on How COVID-19 Spreads in more detail.
For more information, please visit frequently asked questions about COVID-19.
Prevention and treatment
Vaccines are the best way to protect yourself and those around you from getting sick from COVID-19. Learn more about COVID-19 vaccines, COVID-19 vaccine safety, and where to get vaccinated.
Some other prevention measures continue to be necessary for all people, even people who have been fully vaccinated. Visit COVID-19 Prevention and Treatment to learn how you can protect yourself from the risk of illness.