Influenza H3N2v

Type: Viral

Geography: United States

Cases Per Year: 10 to 300

Fatality Rate: 1%

First Discovered: 2011 in the United States 

H3N2v is a non-human influenza virus that normally circulates in pigs and that has infected humans. Spread from infected pigs to humans is thought to happen in the same way that seasonal influenza viruses spread between people: mainly through infected droplets when an infected pig coughs or sneezes.

Symptoms include fever and respiratory symptoms, body aches, nausea, vomiting, and diarrhea. People at high risk of developing complications from the virus are children younger than 5 years, people 65 years and older, pregnant women, and people with long-term health conditions (like asthma, diabetes, weakened immune systems, and neurological or neurodevelopmental conditions).

Photo: H1N1 influenza virus – Electron micrograph.