At least 23 passengers from the hantavirus-infected cruise ship MV Hondius have already left the boat and returned home, including to the US, according to a shocking new report — and one of them has already gotten sick. The travelers did not realize that they had been exposed to the deadly virus — which has a mortality rate of up to 40% — when they left the luxury boat during its stop at Saint Helena, a tiny island in the South Atlantic, on April 23, according to a passenger who is still aboard the ship. “There are 23 people wandering around there, and until three days ago, no one had contacted them,” the passenger told Spanish newspaper El Pais . Nearly two dozen MV Hondius passengers ditched the voyage and headed back to their home countries almost two weeks ago, a cruiser claimed Wednesday. AFP via Getty Images “The Australian went back to Australia, the one from Taiwan to Taiwan, the Americans to all corners of North America.…