Influenza H1N1, H5N1-CDC

ICD-10 J10: Seasonal
ICD-10 J11: Virus Not Identified

1.6.1 Identification

Viral infection that affects mainly the nose, throat, bronchi and, occasionally, lungs. Although uncomplicated influenza-like illness (fever, cough or sore throat) has been reported in many cases, mild respiratory illness (nasal congestion, rhinorrhea) without fever and occasional severe disease also has been reported. Other symptoms reported with swine influenza A virus (H1N1) infection include vomiting, diarrhea, myalgia, headache, chills, fatigue, and dyspnea. Conjunctivitis is rare, but has been reported. Severe disease (pneumonia, respiratory failure) and fatal outcomes have been reported with swine influenza A virus infection.

Case classification
Confirmed case: of influenza A (H1N1) virus infection: a person with an acute respiratory illness with laboratory confirmed influenza A (H1N1) virus infection at CDC by viral culture or four-fold rise in swine influenza A (H1N1) virus-specific neutralizing antibodies