Emerging disease surveillance and response

Avian Influenza

Avian Influenza Weekly Update Number 631 (6 April 2018)


Human infection with avian influenza A(H5N1) virus

Between 30 March and 15 April 2018, no new cases of human infection with avian influenza A(H5N1) virus were reported to WHO in the Western Pacific Region.

As of 5 April 2018, a total of 238 cases of human infection with avian influenza A(H5N1) virus were reported from four countries within the Western Pacific Region since January 2003 (Table 1). Of these cases, 134 were fatal, resulting in a case fatality rate (CFR) of 56%. The last case was reported from China, with onset date of 27 December 2015 (1 case, no death).

Globally, from January 2003 to 2 March 2017, there were 860 cases of human infection with avian influenza A(H5N1) virus reported from 16 countries worldwide. Of these 860 cases, 454 were fatal (CFR of 53%). The last case was reported from Indonesia on 26 September 2017.
(source: http://www.who.int/influenza/human_animal_interface/2018_03_02_tableH5N1.pdf?ua=1 and http://www.who.int/influenza/human_animal_interface/HAI_Risk_Assessment/en/


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