ISTANBUL -- A fourth jab of vaccine? Would-be travelers in Turkey began receiving just that on Monday to become eligible for the vaccine passports necessary for them to journey to the U.S. and Europe.
Turkey began in January to inoculate millions with the Chinese Sinovac Biotech vaccine, with many receiving a full two doses. But a number of countries do not count that vaccine among those they require, and to those looking to travel abroad, Monday marked the first day they could get a second shot of the Pfizer offering in order to comply.
