With ANY antigen test please keep in mind a few things. Hopefully none of you or the people you love have to take this test because you are sick. Its a good idea to understand it before you get symptoms and feel rushed, scared or anxious and cant think straight. In simple terms, an Antigen test discovers parts of the viral protein specifically the cool little spikes you see in pictures. It doesnt pick up and amplify RNA like the PCR tests. A PCR test is sort of like a cop asking for your drivers license and using that license to verify who you are. An antigen test is more like a cop seeing you in a black Ford Mustang with a red stripe and using that to identify you....could be someone else in the car but probably not. If you get an antigen test and are symptomatic, you need to get a "reflex test" if the test shows NEGATIVE. Not all doctors and hospitals are following protocol with this. A reflex test is sending you for another test that is more accurate (the PCR test). There will be false negatives with the antigen test and thats expected. If you are symptomatic and test negative with an antigen test, just go get the PCR test. Again, some doctors and clinics (especially ones new to testing...there will be alot of organizations out there picking this test up that are not familiar with point of care testing....they have new CLIAs and will not be good consultants as they have zero experience). An antigen test is a SARS test. Not that anyone will have the first SARS but antigen testing does not distinguish the difference....SARS and SARS COV2 look the same to the test. Other cross reactives and ok....what that means is if you have herpes or Leprosy or some other virus, it will not pick that up as a positive and thats a good thing. Antigen testing works really well and is a key part of diagnosing but not the ONLY part.