Covid, unlike the Pfizer and Oxford-AstraZeneca shots.Ministers are reportedly hoping the Janssen vaccine can be given as a "jab and go" option to younger Brits who are desperate to start enjoyng summer.According to The Telegraph, 18 to 29-year-old's could be the prime target for the jab.A source told the publication: "Where it will be useful is it could work really well for the younger cohort - the 18 to 29 year olds."One hit and you are done - and you are off to Ibiza."UK medical regulators are yet to approve the jab, which was given the green light for use in the United States.Want all the latest shocking news and views from all over the world straight into your inbox?We've got the best royal scoops, crime dramas and breaking stories -.