A rare strain of the virus has killed three people linked to a cruise ship outbreak in recent weeks

Russia has stepped up border controls to prevent the potential spread of the deadly Andes hantavirus strain, the country’s public health watchdog, Rospotrebnadzor, has said.

The rare strain of the virus – typically spread through contact with infected rodent droppings, urine or saliva – has been linked to at least three deaths connected to a Dutch-flagged cruise ship since April 11. A total of 11 infection cases, including the deaths, have been confirmed among the ship’s 147 passengers.

The outbreak was discussed during a Rospotrebnadzor video conference on Tuesday.…