You should take a COVID-19 test if you have symptoms of COVID-19, such as cough, fever, chills, fatigue, loss of taste or smell, shortness of breath, or sore throat. If you have been exposed to someone who tested positive for COVID-19, it is best to wait about five days after exposure before getting tested. Testing is also recommended before visiting people at high risk of severe illness or after being in crowded or high-risk settings. If you have symptoms and your rapid antigen test is negative, it is advised to repeat the test after 48 hours to confirm your status. Rapid at-home tests are convenient for accessibility, and PCR tests are recommended ideally about five days after exposure for accuracy. Testing immediately after exposure is less effective as it may not detect the virus early enough.