Lack of testing requirement in CDC's COVID guidance not because of short supply, Dr. Walensky says

The CDC's new COVID-19 guidelines are drawing some criticism from medical experts for not requiring a negative test for asymptomatic patients to leave isolation. Some have speculated the lack of a testing requirement is due to a short supply of tests in the U.S.

But CDC Director Dr. Rochelle Walensky said Wednesday that's not the case. 

"This really had nothing to do with supply. It had everything to do with knowing what we would do with the information when we got it," she said on "CBS Mornings," explaining that it's unclear if rapid antigen tests provide useful information later in the infection period.