"What's become really clear is that this is a problem that occurs after the second dose of this vaccine, so we can be confident that the risk-benefit is favourable for the first dose for these older teenagers."Professor Adam Finn of the JCVI addresses concerns of rare cases of myocarditis (heart inflammation) linked to the second Covid vaccine in younger people and says they must "really evaluate what options we've got" when it comes to double jabs.BBC Newsnight bbc.in/3xruIpB