Zoonotic Influenza – United States

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Ohio sees second case of human swine influenza H1N2v this year.

Symptoms of influenza have a quick onset and are present as fever, dry cough, sore throat, headache, extreme tiredness, congested nose, and body aches. It is possible that young children and elderly people do not develop a fever.

The patient is less than 18 years of age, was not hospitalized, and has completely recovered from their illness.

It is possible that limited human-to-human transmission occurred. No ongoing human-to-human transmission has been identified.

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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