COVID-19 (coronavirus disease 2019) is a disease caused by a virus named SARS-CoV-2 and was discovered in December 2019. It is very contagious and has quickly spread around the world. The U.S. currently has the highest number of cases and deaths from COVID-19.
Viruses are constantly changing, which is common and expected. These are called “variants”. The Delta and Omicron variants are the most widespread in the country, and may cause slightly different symptoms. The Centers for Disease Control and Prevention (CDC) is tracking these variants.