Frequently Asked Questions about COVID-19

COVID-19 is a contagious disease caused by the SARS-CoV-2 virus.

COVID-19 most often causes respiratory symptoms similar to a cold, influenza (flu), or pneumonia but can also affect other parts of your body. Most people with COVID-19 have mild symptoms, but some people become severely ill.

More than 1 million people have died from COVID-19 in the US since the virus first emerged in Wuhan, China in December 2019.

Coronavirus disease digital illustration

General

Symptoms

Prevention

Testing

Treatment

Updated September 2024

Sources: American Academy of Pediatrics, Centers for Disease Control and Prevention, Food and Drug Administration

Learn more about coronaviruses at www.nfid.org/coronaviruses

Related Resources

Filling prescription at pharmacy
FAQs & Fact Sheets

What Is an Antiviral?

Overview of antivirals—what they are, how they work, and what diseases they help treat

Learn More
Illustrated group of diverse people to show percentage vaccinated
Surveys & Publications

2024 National Survey: Attitudes and Behaviors about Influenza, COVID-19, Respiratory Syncytial Virus, and Pneumococcal Disease

2024 national survey on flu, RSV, COVID-19, and pneumococcal disease

Learn More
Contagious Chronicles: Updated Recommendations for Respiratory Season
Contagious Chronicles

Contagious Chronicles: Updated Recommendations for Respiratory Season

In this episode, NFID experts discuss updated recommendations to help protect against COVID-19, influenza (flu), respiratory syncytial virus (RSV), and pneumococcal disease …

Learn More