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- Both cause fever, cough, body aches, fatigue; sometimes vomiting and diarrhea.
- Can be mild or severe, even fatal in rare cases.
- Can result in pneumonia.
- Both can be spread from person to person through droplets in the air from an infected person coughing, sneezing or talking.
- A possible difference: COVID-19 might be spread through the airborne route (see details below under Differences).
- Flu can be spread by an infected person for several days before their symptoms appear, and COVID-19 is believed to be spread in the same manner, but we don’t yet know for sure.
- Neither virus is treatable with antibiotics, which only work on bacterial infections.
- Both may be treated by addressing symptoms, such as reducing fever. Severe cases may require hospitalization and support such as mechanical ventilation.
Both may be prevented by frequent, thorough hand washing, coughing into the crook of your elbow, staying home when sick and limiting contact with people who are infected.
Differences: COVID-19 and the Flu
- COVID-19: Caused by one virus, the novel 2019 coronavirus, now called severe acute respiratory syndrome coronavirus 2, or SARS-CoV-2.
- Flu: Caused by any of several different types and strains of influenza viruses.
- COVID-19: Approximately 127,863 cases worldwide; 1,323 cases in the U.S. as of Mar. 12, 2020.*
- Flu: Estimated 1 billion cases worldwide; 9.3 million to 45 million cases in the U.S. per year.
- COVID-19: Approximately 4,718 deaths reported worldwide; 38 deaths in the U.S., as of Mar. 12, 2020.*
- Flu: 291,000 to 646,000 deaths worldwide; 12,000 to 61,000 deaths in the U.S. per year.
The COVID-19 situation is changing rapidly. Since this disease is caused by a new virus, people do not have immunity to it, and a vaccine may be many months away. Doctors and scientists are working on estimating the mortality rate of COVID-19, but at present, it is thought to be higher than that of most strains of the flu.
*This information comes from the Coronavirus COVID-19 Global Cases map developed by the Johns Hopkins Center for Systems Science and Engineering.