British Prime Minister Boris Johnson on Friday received a first dose of AstraZeneca's Covid vaccine, assuring the public the jab was safe. "I literally did not feel a thing. It was very good, very quick," he told reporters at a London hospital close to his Downing Street residence. "Everybody, when you do get your notification to go for a jab, please go and get it. It's the best thing for you, the best thing for your family and for everybody else," he added, stressing the renewed green light given by scientists in Europe. jit/bp