abide no administration is facing a covid testing shortage now just as millions of americans are returning to work after the holiday and millions of kids are getting back to class. here's white house correspondent jacqui heinrich. >> unclear whether president biden thinks the revised cdc quarantine guidance should have included a testing component. >> i will be talk about that later. >> after his two top public health officials make conflicting statements about whether it's necessary. >> pcr test after infection can be positive for up to 12 weeks. so that is not going to be helpful. if you got a rapid test at five days and it was negative, we weren't convinced that you weren't still transmissible. >> why not test people at that time? i myself feel that that's a reasonable thing to do. >> now the administration is floating more possible policy changes in response to public pressure. >> there has been some concerns about why we don't ask people at