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"You want to detect the virus early, and the PCR test is the most sensitive for that to make sure you are not infectious for your trip," he says, acknowledging that many places require a negative COVID-19 test 72 hours before boarding a plane. School and workplaces. For surveillance, such as at schools or workplaces, antigen tests work well, Dr
Compared to molecular tests, antigen tests are more likely to generate false negative results, especially when performed on people who don't have symptoms.
Similar to a home pregnancy test, results show a colored line to signify positive or negative. Where can you get one. Antigen tests are offered in pharmacies, doctor's offices, and can be purchased to use at home