What is COVID-19?

What is COVID-19?

COVID-19 is a disease that was first identified in humans in 2019. It is caused by the SARS-CoV-2 virus. Because it is a new virus, we are studying it carefully and continue to learn about it. Most people who have COVID-19 have mild symptoms. But COVID-19 can also cause severe illness and even death. Some groups have a higher risk of severe COVID-19 disease, especially unvaccinated older adults and unvaccinated people who have certain medical conditions. People can also be infected and never have symptoms. Some people experience post-COVID conditions. This includes a wide range of new or returning symptoms or ongoing health problems that can last for weeks or months. Even people who did not have symptoms at first can experience post-COVID conditions. See CDC Long-Term effects.

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