Coronavirus Medical Reference

Coronaviruses have almost always been with us. Here is how and where the new strain of coronavirus behind the pandemic came to infect humans.

In rare cases, a coronavirus jumps from animals to humans. A small number of pets have been infected with the virus that causes COVID-19. Find out what kinds of animals have gotten the virus, how to protect yourself and your pet, and what to do if your pet gets sick.

Variants of COVID: Learn more about COVID variants, including the Omicron variant, and what that means for people's health.

If you’re pregnant, you may have questions and concerns about how coronavirus might affect you and your unborn baby. Here are the answers we know so far.

Si está embarazada, es posible que tenga preguntas e inquietudes sobre cómo podría el coronavirus afectar su salud y la de su bebé.

Bronchitis is inflammation of your airway, usually because of a virus. It can share symptoms of COVID-19. How do you know which one you have?

What is the risk of my child becoming sick with the coronavirus disease? Here’s key information about COVID-19, variants, children, and infants.

Lea más sobre cuánto tiempo puede sobrevivir el coronavirus que causa el COVID-19 en encimeras, pomos y otras superficies que toca con frecuencia.

Herd immunity is when a large part of the population is immune to a specific disease.

¿Qué probabilidad tiene mi hijo de adquirir la enfermedad del coronavirus? Lea información importante sobre el COVID-19, los niños y los bebés.

People with high blood pressure may be at higher risk for catching the coronavirus and may get sicker from it. Learn what you can do to protect yourself.

The coronavirus can affect your body much the same way as the viruses that cause the common cold. But it also can lead to more serious symptoms, including organ failure and trouble breathing.

If you're feeling sick, you may wonder if you have COVID-19. Find out how to get tested, how the tests work, and how long it may take to get results.

Si se siente mal, es posible que crea que tiene el COVID-19. Lea más sobre la prueba, cómo se hace la prueba y cuánto pueden tardar los resultados.

There are some options if you're looking for an at-home test for COVID-19. Learn more.

As coronavirus cases grow, here's what you need to know about how the virus spreads and how to protect your family.

What's the incubation period for coronavirus? Learn more about the incubation period for coronavirus, when the virus is most contagious, and how long to quarantine after you’ve been exposed to COVID-19.

Mientras los casos del coronavirus aumentan, esto es lo que necesita saber sobre la propagación del virus, y cómo proteger a su familia.

COVID-19 is a condition caused by a coronavirus. Some people have severe symptoms while others have mild signs or none. Learn more about what to watch for.

Los síntomas del COVID-19 pueden ser de leves a severos. Lea más sobre síntomas que debe tener presente, y sugerencias para determinar si tiene el COVID-19, catarro, gripa, u otra condición de salud.

Most people can treat COVID-19 symptoms at home, but some people will need hospital care. Find out what treatment involves.

The coronavirus causing COVID-19 is a new (novel) strain called SARS-CoV-2. Most coronaviruses cause mild respiratory infections and flu-like symptoms, but severe cases can be fatal. Learn how to spot symptoms, risk factors, prevent spreading the disease, and find out what to do if you think you have it.