Buenos Aires (AFP) – Argentina is trying to solve a medical mystery after 57 sailors were infected with the coronavirus after 35 days at sea, despite the entire crew testing negative before leaving port. The Echizen Maru fishing trawler returned to port after some of its crew began exhibiting symptoms typical of COVID-19, the health ministry for the southern Tierra del Fuego province said Monday. According to the ministry, 57 sailors, out of 61 crew members, were diagnosed with the virus after undergoing a new test. However, all of the crew members had undergone 14 days of mandatory quarantine at a hotel in the city of Ushuaia. Prior to that, they had negative results, the ministry said in a statement.