WHO announced on February 25, 2016 that there are 28 cumulative H9N2 cases.link After reviewing years of WHO reports the below cases are found:
1998 - 1999
China - 5 cases, ages 1-70, on the Mainland, March 1999 WHO report Apr 3, 1999
China - 2 children in Hong Kong, 1999 WHO report Apr 3, 1999
2003
China - Male, 5, in Hong Kong, 2003 WHO report Dec 10, 2003
2011
Bangladesh - No details. FAO report Mar 28, 2011 WHO reference
2014
China - 2 cases, no details, mild illness - 2014 WHO report March 3, 2015
2015
Bangladesh - Female, 4, onset February 1, 2015, recovered February 7 WHO report September 4, 2015
Egypt - Male, 3, recovered, Aswan WHO report March 3, 2015
Egypt - Female, 1, mild illness, Cairo, WHO report June 23, 2015
China - Female, 4, onset April 14, 2015, mild illness Anhui WHO report December 14, 2015
Egypt - Female, 7, onset April 29, tested positive May 7, recovered, co-infection with flu B, WHO report June 23, 2015
China - Male, 2, onset September 1, 2015, mild illness, Hunan, WHO report December 14, 2015
China - Female, 15, onset September 15, 2015, mild illness, Hunan WHO report December 14, 2015
China - Female, 1, onset October 27, 2015, mild illness, Hunan WHO report December 14, 2015
Bangladesh - Male, 48, onset October 27, 2015, poultry worker, recovered WHO report Jan 20, 2016
China - Female, 84, onset February 4, 2015, poultry exposure, Guangdong WHO report October 3, 2016
China - Male, no age, information from a submission to GenBank, collection date February 7 (US dating) link
2016
China - Female, 57, onset date unknown, hospitalized February 16, 2016 hospitalized, Sichuan WHO report Jan 25, 2016 Death note
Egypt - Male, 18, onset April 10, FAO report April 27, 2016 WHO report May 9, 2016
China - Female, 4, serious condition, Guangdong province confirmation June 19, 2016 link
China - Female, 29, onset August 8, recovered, Guangdong province confirmation August 25, 2016 link WHO report October 3, 2016
China - Child, 10 months, onset August 7, recovered. Yunnan province confirmation August 26, 2016 link WHO report October 3, 2016
China - Female, 4, onset August 2, recovered, no poultry exposure, Jiangxi province confirmation August 19, 2016 link WHO report October 3, 2016
China - Female, 5, onset February 1, no poultry exposure, Henan WHO report October 3, 2016
China, Male, 3, onset July 9, poultry exposure, Guangdong WHO report October 3, 2016
2017
China, Male, 11 months, onset February 6, exposure to poultry, hospitalized & recovered WHO report April 20, 2017
China, Male, 32, onset April 28, mild case, reported cured by Beijing CDC link WHO report May 16, 2017
China, Female, 2 months, onset April 28, hospitalized June 9, recovered, Guangdong province WHO report July 25, 2017
China, Child, onset September 18, mild illness, no apparent contact with poultry WHO report September 27, 2017
China, Female, 30 months, onset November 27 (December 1?) , Changsha, Hunan province link WHO report December 7, 2017
China, Female, 9, onset December 29, 2017, mild, Anhui province WHO report March 2, 2018
2018
China, Female, 3, onset January 21, 2018, mild, Guangdong province WHO report March 2, 2018
China, Female, 51, onset February 13, 2018, mild, Beijing WHO report March 2, 2018
China, Female, 24, onset July 21, 2018, mild, Shenzhen, Guangdong province link
China, Young child, onset October 10, 2018, Guangxi province WHO report December 13, 2018
China, Young child, onset October 16, 2018, backyard poultry exposure, Guangdong province WHO report December 13, 2018
China, Female, 32, onset December 19, 2018, mild, Shenzhen, Guangdong province link WHO report January 21, 2019
China, Male, 2, mild case on December 27, 2018, from Hunan province, reported by Taiwan Health link WHO report February 12, 2019
2019
China, Female, 8, onset January 27, 2019, mild case, from Lishui City, Yunnan province, reported by Macau health link WHO report February 12, 2019
China, Male, 9, onset March 15, 2019, hospitalized March 16, 2019, serious condition, poultry stall contact, Taizhou, Jiangsu province, reported by Macau health link
Oman - Female, 13-month-old baby girl with onset on March 17, 2019 via WHO Influenza Virus Traceability Mechanism lists positive nasal sample of H9N2 collected March 21, 2019 link
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Notes:
"A total of 28 laboratory-confirmed cases of human infection with avian influenza A(H9N2) viruses, none fatal, have been detected globally. In most human cases, the associated disease symptoms have been mild and there has been no evidence of human-to-human transmission. Influenza A(H9N2) viruses are enzootic in poultry populations in parts of Africa, Asia and the Middle East. The majority of viruses that have been sequenced belong to the A/quail/Hong Kong/G1/97 (G1), A/chicken/Beijing/1/94 (Y280/G9), or Eurasian clades." WHO report dated February 25, 2016 link
"..there were five H9N2 cases found in mainland China in 1998 and 1999, respectively, and three human H9N2 AI cases reported in Hong Kong in 1999 and 2003 respectively." WHO link
1998 - 1999
China - 5 cases, ages 1-70, on the Mainland, March 1999 WHO report Apr 3, 1999
China - 2 children in Hong Kong, 1999 WHO report Apr 3, 1999
2003
China - Male, 5, in Hong Kong, 2003 WHO report Dec 10, 2003
2011
Bangladesh - No details. FAO report Mar 28, 2011 WHO reference
2014
China - 2 cases, no details, mild illness - 2014 WHO report March 3, 2015
2015
Bangladesh - Female, 4, onset February 1, 2015, recovered February 7 WHO report September 4, 2015
Egypt - Male, 3, recovered, Aswan WHO report March 3, 2015
Egypt - Female, 1, mild illness, Cairo, WHO report June 23, 2015
China - Female, 4, onset April 14, 2015, mild illness Anhui WHO report December 14, 2015
Egypt - Female, 7, onset April 29, tested positive May 7, recovered, co-infection with flu B, WHO report June 23, 2015
China - Male, 2, onset September 1, 2015, mild illness, Hunan, WHO report December 14, 2015
China - Female, 15, onset September 15, 2015, mild illness, Hunan WHO report December 14, 2015
China - Female, 1, onset October 27, 2015, mild illness, Hunan WHO report December 14, 2015
Bangladesh - Male, 48, onset October 27, 2015, poultry worker, recovered WHO report Jan 20, 2016
China - Female, 84, onset February 4, 2015, poultry exposure, Guangdong WHO report October 3, 2016
China - Male, no age, information from a submission to GenBank, collection date February 7 (US dating) link
2016
China - Female, 57, onset date unknown, hospitalized February 16, 2016 hospitalized, Sichuan WHO report Jan 25, 2016 Death note
Egypt - Male, 18, onset April 10, FAO report April 27, 2016 WHO report May 9, 2016
China - Female, 4, serious condition, Guangdong province confirmation June 19, 2016 link
China - Female, 29, onset August 8, recovered, Guangdong province confirmation August 25, 2016 link WHO report October 3, 2016
China - Child, 10 months, onset August 7, recovered. Yunnan province confirmation August 26, 2016 link WHO report October 3, 2016
China - Female, 4, onset August 2, recovered, no poultry exposure, Jiangxi province confirmation August 19, 2016 link WHO report October 3, 2016
China - Female, 5, onset February 1, no poultry exposure, Henan WHO report October 3, 2016
China, Male, 3, onset July 9, poultry exposure, Guangdong WHO report October 3, 2016
2017
China, Male, 11 months, onset February 6, exposure to poultry, hospitalized & recovered WHO report April 20, 2017
China, Male, 32, onset April 28, mild case, reported cured by Beijing CDC link WHO report May 16, 2017
China, Female, 2 months, onset April 28, hospitalized June 9, recovered, Guangdong province WHO report July 25, 2017
China, Child, onset September 18, mild illness, no apparent contact with poultry WHO report September 27, 2017
China, Female, 30 months, onset November 27 (December 1?) , Changsha, Hunan province link WHO report December 7, 2017
China, Female, 9, onset December 29, 2017, mild, Anhui province WHO report March 2, 2018
2018
China, Female, 3, onset January 21, 2018, mild, Guangdong province WHO report March 2, 2018
China, Female, 51, onset February 13, 2018, mild, Beijing WHO report March 2, 2018
China, Female, 24, onset July 21, 2018, mild, Shenzhen, Guangdong province link
China, Young child, onset October 10, 2018, Guangxi province WHO report December 13, 2018
China, Young child, onset October 16, 2018, backyard poultry exposure, Guangdong province WHO report December 13, 2018
China, Female, 32, onset December 19, 2018, mild, Shenzhen, Guangdong province link WHO report January 21, 2019
China, Male, 2, mild case on December 27, 2018, from Hunan province, reported by Taiwan Health link WHO report February 12, 2019
2019
China, Female, 8, onset January 27, 2019, mild case, from Lishui City, Yunnan province, reported by Macau health link WHO report February 12, 2019
China, Male, 9, onset March 15, 2019, hospitalized March 16, 2019, serious condition, poultry stall contact, Taizhou, Jiangsu province, reported by Macau health link
Oman - Female, 13-month-old baby girl with onset on March 17, 2019 via WHO Influenza Virus Traceability Mechanism lists positive nasal sample of H9N2 collected March 21, 2019 link
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Notes:
"A total of 28 laboratory-confirmed cases of human infection with avian influenza A(H9N2) viruses, none fatal, have been detected globally. In most human cases, the associated disease symptoms have been mild and there has been no evidence of human-to-human transmission. Influenza A(H9N2) viruses are enzootic in poultry populations in parts of Africa, Asia and the Middle East. The majority of viruses that have been sequenced belong to the A/quail/Hong Kong/G1/97 (G1), A/chicken/Beijing/1/94 (Y280/G9), or Eurasian clades." WHO report dated February 25, 2016 link
"..there were five H9N2 cases found in mainland China in 1998 and 1999, respectively, and three human H9N2 AI cases reported in Hong Kong in 1999 and 2003 respectively." WHO link
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