Argentine officials and experts are scrambling to determine if their country is the source of a deadly hantavirus outbreak that has gripped Atlantic cruise, MV Hondius. The health emergency aboard the vessel coincides with a surge of hantavirus cases in Argentina, which local public health researchers attribute to the recently accelerating effects of climate change. Argentina, the departure point for the Antarctic cruise, is consistently ranked by the World Health Organisation as having the highest incidence of this rare, rodent-borne disease in Latin America. Experts suggest higher temperatures expand the virus’s range because, as it gets warmer and ecosystems change, hantavirus-carrying rodents can thrive in more places. People typically contract the virus from exposure to rodent droppings, urine, or saliva.…