A hantavirus outbreak aboard the MV Hondius cruise ship has killed three passengers and sickened at least four others , worrying health experts. People most often contract the rare but deadly disease from the feces, urine or saliva of infected rodents, but the World Health Organization insisted Tuesday that no rodents have been found on the liner. Now, scientists are looking at one particularly worrisome potential cause of transmission. “The situation is particularly concerning given that it appears that this is likely the Andean strain of hantavirus,” Donna A. Patterson , a professor in the Department of History, Political Science, Philosophy and Law Studies at Delaware State University, told The Post. The origins of the hantavirus cruise outbreak are still unknown, and experts are concerned about the isolation strategy. AFP via Getty Images “In the right conditions, often in close quarters, it can spread from human to human,” she added.…