evidence: - Testing is the only way to know that someone has been infected with SARS-CoV-2. People with HIV should immediately contact their health care provider if they test positive for COVID-19. People with HIV should also continue taking their HIV medicines as prescribed. [...] You should follow CDC recommendations regarding symptoms of COVID-19 and get tested immediately if you think you may be infected with SARS-CoV-2. A person can be infected with SARS-CoV-2 but show only a few symptoms or no symptoms at all (also known as asymptomatic infection). Testing is the only way to know that someone has been infected with SARS-CoV-2. Testing also ensures that people are not spreading the virus to others. Most health care providers offer COVID-19 testing. Contact your health care provider if you are experiencing COVID-19–related symptoms or have come in contact with an infected person. People can also get tested for COVID-19 at their local pharmacies by making scheduled appointments or drive throughs or by purchasing at-home rapid tests over the counter at local pharmacies. Residential households in the United States can now order free at-home testing kits from the U.S. Postal Service. Visit the CDC website for more information about self-testing and free at-home COVID-19 tests, and visit your state or local health department’s website for information on additional testing sites.