An international operation is underway to track down 30 cruise passengers who disembarked on a remote Atlantic island, as fears grow that a deadly human-to-human strain of Hantavirus is spreading. A third British national is now a suspected case on Tristan da Cunha, the world ’s most remote inhabited island. The exploration ship MV Hondius made a stop there in mid-April, just days before the true scale of the outbreak was realised. The World Health Organisation (WHO) has now issued an alert to