Oceanwide Expeditions has revealed that 30 passengers disembarked from its cruise ship hit by a hantavirus outbreak on April 24, on the remote island of St. Helena, nearly two weeks after the first passenger died. MADRID — Health authorities across four continents Thursday were tracking down and monitoring passengers who disembarked a hantavirus-stricken cruise ship before its deadly outbreak was detected, and trying to trace others who may have come into cont... [6656 chars]