Not "news" for those of us who discussed this in the posts about the problems with current testing. Dead cell problem a/k/a "viral shedding." Also discussed as part of that is the fact that it is or has been a limitation in determining when a person is actually no long infectious. Viral shedding can go on long after a person is free of live viruses. If the type of test used is just picking fragments of the virus.'' You are welcome.