Hantavirus in the US: Where the rare, sometimes deadly disease has been found

There have been three deaths and at least eight reported cases of hantavirus among passengers of the MV Hondius cruise ship, with at least five states monitoring residents who returned from the ship. The virus has historically caused around 800 to 900 cases in the US, mostly west of the Mississippi River. Hantavirus can lead to a deadly syndrome called hantavirus pulmonary syndrome (HPS), with a mortality rate of 30% to 60%.