works is it initially, you re exposed and the virus reproduced itself hundreds and thousands of time ands you have no symptoms. that is when you re the most contagious, before you ever develop symptoms. and then you start to develop symptoms and then the virus reproduction becomes less and less. and then as your symptoms abate, meaning decrease, then the virus replication is no longer part of the disease process any more. so i think it is perfectly reasonable that when people are asymptomatic after having an infection, they could go back to school, you know, wear a mask, preferably, then having to constantly test because testing is often not available and it could be misleading. the pcr test could be positive when you re no longer contagious. so i think what the children s hospital of philadelphia has done is come up with a more practical and usable system. practical and usable. it is not what we re hearing out of the cdc. a lot of criticism as kaitlan collins talked about specifical