making on how we re addressing the pandemic through messaging or through political concerns. harris: jackie heinrich live at the white house. they are defending the cdc admit criticism its new post infection testing guidelines are confusing saying the president has full confidence in his medical team of experts at the cdc. this as the director walensky denies a nationwide testing shortage influenced the agency s decision not to include a testing component in the revised quarantine guidance. days earlier she made the case testing after isolation is unnecessary because the tests don t reliably measure whether a person is contagious. yet the cdc last month relied on testing in other policies it announced. like the test to stay program to keep kids exposed to covid in school. also the policy to allow sick healthcare workers to return to work. yet another policy the cdc
after a 5-day quarantine if they are positive. but they should test if they have access to one. there are also currently no plans to update the definition of fully vaccinated to include a booster shot. and in chicago big news, a major setback for families anxious to get their kids back in school as classes there were canceled today. after the powerful teacher s union voted to go virtual until at least january 18th. chicago s mayor is firing back saying the decision is not based in science. more on that from chicago in just a moment. first, let s go to the white house, correspondent jacqui heinrich live from the north lawn. good evening, jacqui. good evening to you, bret. just days after arguing that testing after five days of isolation isn t necessary because the tests don t accurately measure whether a person is contagious, the cdc revised its policy. the white house defending the cdc amid criticism its new post infection testing guidelines are confusing.