World Covid-19 Live Updates: Amid Vaccine Shortage, C.D.C. Quietly Changes Immunization Guidelines January 22, 2021January 22, 2021THE NEW YORK TIMESComments Off on Covid-19 Live Updates: Amid Vaccine Shortage, C.D.C. Quietly Changes Immunization Guidelines Travelers to the United States will have to quarantine, and the E.U. is tightening rules regarding its member countries.
