Zoonotic Influenza – United States
1 case of influenza A(H1N1) in Iowa on June 4, 2021 transmitted by patient working on a farm with swine flu present.
The patient is an adult, was not hospitalized and has completely recovered. There is no reported human-to-human transmission.
5 human infections with a novel influenza A virus has been reported in the United States so far with three occurring in children and two in adults. All patients had direct contact with swine flu.
Photo: H1N1 virus colorized electron micrograph.
Swine influenza is probably the most famous zoonotic influenza. It is an infection caused by any one of several types of swine influenza viruses. As of 2009, the known SIV strains include influenza C and the subtypes of influenza A known as H1N1, H1N2, H2N1, H3N1, H3N2, and H2N3. These are relatively new strains of an influenza virus that causes symptoms similar to the regular flu.
Swine flu made headlines in 2009 when it was first discovered in humans and became a pandemic.
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