https://ift.tt/2wwdHAe C.D.C. Eases Coronavirus Vaccine Rules for ‘Exceptional Circumstances’ Clinical Trials, Shortages, Vaccination and Immunization, Coronavirus (2019-nCoV), United States Politics and Government The agency now says patients may switch authorized vaccines between the first and second doses, and also extend the interval between doses to six weeks. BY SHERYL GAY STOLBERG https://ift.tt/365RR66 January 23, 2021 at 04:59AM