It's not just whether you are infectious but whether you will become infectious. Hardly anyone cares about covid anymore, but a year or two ago, people would o

It's not just whether you are infectious but whether you will become infectious. Hardly anyone cares about covid anymore, but a year or two ago, people would often take a test before they, for example, stayed over at a relative's house. If you take a test right before you arrive, and you stay for a couple of days, if you just caught covid the day you arrived, you'd like to know that. That's where a more sensitive test is really useful. This is a particular problem with newer variants of covid because they multiply much faster. A very low viral load in the nose when the test is taken can turn into a lot in a matter of hours. Anyhow all of this is fairly academic at this point because no one is taking any tests and everyone is doing big events with lots of people.