In 2011 there have been 4 confirmed cases of hantavirus. These patients have been recovering favorably. All reported were in Argentina. The previous year, there had been a total of 30 positive cases. The symptoms originally appear to be similar to flu, however after 3 days patients experience difficulty in breathing.
Several hantaviruses are associated with human infection in Argentina. This includes the Andes virus, Oran, Bermejo virus, and Andes-like virus. All of them are carried by rodents. Some of the most notable reserviors are the long-tailed pygmy rice rat host, the yellow pygmy rice rat, and the I. flavescens. The virus is acquired by breathing in the virus from the dried feces fo the rodent.