Before we begin: COVID-19 (coronavirus disease 2019) is a respiratory disease caused by a virus. It can be very contagious. Learn about symptoms, prevention, and treatment.
This tutorial walks you through everything you need to know about covid-19 (coronavirus disease 2019). We explain it in plain language, step by step, so whether you are a student, a patient, or simply curious, you will come away with a solid understanding.
We cover what it is, why it matters, how it is diagnosed, and what you can do about it. Key facts are called out along the way.
COVID-19 (coronavirus disease 2019) is an illness caused by a virus. This virus is a coronavirus called SARS-CoV-2. It spreads when a person who has the infection breathes out droplets and very small particles that contain the virus. On this page, you’ll find links to resources on important issues such as symptoms, risks, and how you can protect yourself and your family.
We also have pages on:
COVID-19 testing
COVID-19 vaccines
Post-COVID conditions (long COVID)
Also known as: COVID-19, Coronavirus.
Categories: Infections, Lungs and Breathing.
Source: National Institutes of Health — National Institute of Allergy and Infectious Diseases.
Key Takeaways
Understanding covid-19 (coronavirus disease 2019) is an important part of taking charge of your health. Here is what to remember:
- Know the signs — Recognizing early symptoms can lead to earlier diagnosis and better outcomes.
- Talk to your provider — If you have concerns or a family history of this condition, bring it up at your next checkup.
- Stay informed — Medical knowledge evolves. Keep learning and asking questions.
- You are not alone — Many people deal with this condition. Support groups and educational resources can help.