In a carefully choreographed international effort, the MV Hondius —the cruise ship at the center of a rare outbreak of the Andes strain of hantavirus—was fully evacuated as of May 11. All passengers on board the ship were screened for symptoms before being repatriated on special flights to their home countries, including 18 Americans who returned to the US, health officials said. The passengers are now entering quarantine and will be strictly monitored by medical professionals, who expect new cases to be confirmed over the next 42 days or so. That window is the incubation period of the virus, or how long it takes someone who was exposed to the virus to begin to show symptoms. “That incubation period means that we can see cases again coming up in the next few days, perhaps even next week, and that’s why we need to remain vigilant,” Dr. Olivier le Polain on the WHO’s epidemiology and analytics response team, said in a press conference on May 11.…