A potential third wave of Covid-19 in Northern Ireland could be the worst yet, Stormont's health minister has warned. Robin Swann said the rollout of the vaccine was a welcome development but it could lead to complacency and a slipping of compliance with coronavirus restrictions. "This pandemic is far from finished," he said. "Indeed, I'm still very concerned that the next surge in infections could in fact be the most aggressive yet. "Our health service remains under immense pressure, staff are already exhausted and are increasingly fearful over what they will have to face in the weeks ahead." His warning came as chief scientific adviser Professor Ian Young said people had not restricted their movements during the current two-week