As of 13 April 2013 (17:30 CET), the National Health and
Family Planning Commission notified WHO of an additional six
laboratory-confirmed cases of human infection with influenza A(H7N9)
virus. Of the latest laboratory-confirmed cases, one is from Beijing,
one from Shanghai, two from Jiangsu and two from Zhejiang.
The first patient reported from Beijing is a seven-year-old girl who
became ill on 11 April 2013. The patient from Shanghai is a
56-year-old man who became ill on 1 April 2013. The two patients from
Jiangsu are a 77-year-old woman who became ill on 5 April 2013, and a
72-year-old man who became ill on 1 April 2013. The two patients from
Zhejiang are a 65-year-old man who became ill on 3 April 2013 and a
38-year-old man who became ill on 6 April 2013.
To date, a total of 49 patients have been laboratory-confirmed with
influenza A(H7N9) virus in China; including 11 deaths. More than a
thousand close contacts of the confirmed cases are being closely
Investigations into the possible sources of infection and reservoirs
of the virus are ongoing. Until the source of infection has been
identified, it is expected that there will be further cases of human
infection with the virus in China. So far, there is no evidence of
ongoing human-to-human transmission.
WHO does not advise special screening at points of entry with regard
to this event, nor does it recommend that any travel or trade
restrictions be applied.
About this Disease Outbreak News
1. WHO is currently publishing information on laboratory-confirmed
cases received through the official notification from the Chinese
National International Health Regulations (IHR) Focal Point once a day.
This formal notification and publication follows verification of the
information, and may therefore come after, or not include, some cases
reported through public media and other sources.
2. To date, there is limited information to determine whether the
reported number of cases represents some or all of the cases actually
occurring. As some relatively mild cases of illness have now been
reported, it is possible that there are other such cases that have not
been identified and reported.
3. If the current pattern of sporadic infections continues, WHO will
cease frequent reporting of case numbers, and focus its Disease
Outbreak News on new developments or changes in the pattern or
presentation of infections.