dramatically. >> reporter: the only surviving portion of a federal masking mandate takes effect today, requiring the first shot of a vaccine by medical workers. the supreme court upholding the mandate which applies to facilities that receive federal funding in a ruling last month. and jake, as states look to the federal government to issue guidance on rolling back covid restrictions, senator joe manchin again relaying that he will oppose the nomination of the doctor to lead the fda. this means the vote will be tight and it will rely on gop support. >> that's right. manchin doesn't think he did enough to prevent the opioid crisis. thank you. let's bring in a professor of emergency medicine and professor at brown university school of public health. >> to see you again. as you heard if alexander's report, parents who wanted to