A mosquito-borne virus more common in South America has been detected in the United States. Health officials say the chikungunya virus has been identified in a patient living in the suburbs of New York City who began experiencing symptoms in August. Authorities say it's the first locally acquired case identified in any state since 2015, meaning the patient didn't travel outside the country before becoming infected. It's also the first locally acquired case that New York has ever seen. Chikungunya typically produces symptoms including fever, muscle pain, nausea, fatigue and a rash.

New Hampshire health authorities are reporting the death of a person who tested positive for the mosquito-borne eastern equine encephalitis virus. The Hampstead resident's infection was the first in the state in a decade. The New Hampshire Department of Health and Human Services says the person had severe central nervous system symptoms. There is no vaccine or antiviral treatment available. The U.S. Centers for Disease Control and Prevention says about a third of people who develop encephalitis from the virus die, and survivors can suffer lifelong mental and physical disabilities. There are typically about 11 human cases of eastern equine encephalitis in the U.S. per year.