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Swine Influenza Viruses
Influenza A(H1N1)v viruses
Current situation: Three human infections with A(H1N1)v virus were notified from China in this reporting period.
A 2.5-year-old male from Hunan Province with illness onset on 30 June 2015 was detected through sentinel Severe Acute Respiratory Infection (SARI) surveillance. The patient was hospitalized with pneumonia and later recovered. He had no underlying medical conditions. The case investigation found that the case was exposed to pigs in his village.
The second and third cases were a 5-year-old female and a 4-year-old female from different cities in Yunnan Province with illness onset on 17 November and 22 November 2015 respectively. The cases were detected through sentinel Influenzalike Illness (ILI) surveillance and both had mild symptoms. Exposure history for both cases is not known. To date, a total of seven laboratory-confirmed cases of human infection with this Asian sub-lineage A(H1N1)v virus have been detected in China. The haemagglutinin (HA) gene recovered from viruses detected in the most recent three cases grouped with swine influenza A(H1N1) viruses circulating in China.
Influenza A(H1N1)v viruses
Current situation: Three human infections with A(H1N1)v virus were notified from China in this reporting period.
A 2.5-year-old male from Hunan Province with illness onset on 30 June 2015 was detected through sentinel Severe Acute Respiratory Infection (SARI) surveillance. The patient was hospitalized with pneumonia and later recovered. He had no underlying medical conditions. The case investigation found that the case was exposed to pigs in his village.
The second and third cases were a 5-year-old female and a 4-year-old female from different cities in Yunnan Province with illness onset on 17 November and 22 November 2015 respectively. The cases were detected through sentinel Influenzalike Illness (ILI) surveillance and both had mild symptoms. Exposure history for both cases is not known. To date, a total of seven laboratory-confirmed cases of human infection with this Asian sub-lineage A(H1N1)v virus have been detected in China. The haemagglutinin (HA) gene recovered from viruses detected in the most recent three cases grouped with swine influenza A(H1N1) viruses circulating in China.