The United States is preparing for the possibility that a booster shot will be needed between nine to 12 months after people are initially vaccinated against COVID-19, a White House official said on Thursday.
United States e ipaakanyetsa kgonagalo ya gore go ka nna le tlhokego ya moento o mongwe gape magareng ga dikgwedi di le robongwe go ya go di le 12 morago ga gore batho ba entiwe kgatlhanong le COVID-19, modiredi wa White House o buile jalo ka Labone.