A resident in Iowa has died of Lassa fever, a deadly viral disease spread by rodents, after returning from a trip to West Africa, according to U.S. health officials. The risk to the public is believed to be extremely low. The patient, who was only described as a middle-aged resident of eastern Iowa, returned from West Africa in early October, according to the Centers for Disease Control and Prevention (CDC). They were not symptomatic while traveling back to the U.S. Testing by the Nebraska Laboratory Response Network Lab confirmed Monday that the patient was infected with Lassa fever and they …