RE:how to detect COVID prior to requiring a PCR testPMED system is worthless as it's based on symptoms and many people with COVID-19 have no systems. PCR test is only real and conclusive test. Many PCR tests available now need 24-72 hours to get results. Xphy 25-min PCR test will be a game changer, especially in the airline and transportation industries. Get tested at airport, a few hours before boarding the plane. This is massive as airlines are losing money and want to revamp their businesses.