COVID-19 is a sickness caused by a germ called a virus. This virus can make people feel very sick. It usually starts with a fever, cough, or feeling very tired. Some people might also have trouble breathing. The virus spreads from person to person, so it’s important to stay away from sick people and wash your hands a lot. You can also wear a special mask to help protect yourself. Doctors and scientists are working hard to keep us safe from this virus.