COVID-19 tests are medical assessments used to determine if a person is infected with the SARS-CoV-2 virus, which causes the COVID-19 disease. There are two main types of tests: PCR tests, which detect the virus's genetic material, and antigen tests, which identify specific proteins from the virus. These tests can help diagnose current infections and guide public health measures. Testing is essential for controlling the spread of COVID-19. It allows individuals to know their infection status, enabling them to take appropriate actions, such as isolating if positive. Widespread testing also helps health authorities track outbreaks and manage resources effectively.