Table 1. Reported cases of human infections with avian influenza A viruses.
| Subtype | Nation and year | Symptoms | Confirmed cases/ fatalities |
|---|---|---|---|
| H4N8 | US (1991) | Acute respiratory symptoms | 1/0 |
| H5N1 | HK (1997), AZ, BD, CN, DJ, EG, HK, ID, IQ, KH, LA, MM, NG, PK, TH, TR, VN (2003–2013) | Fever, headache, muscle aches, cough, sore throat, eye infections, pneumonia, acute respiratory distress | 826/440 |
| H6N1 | US (1991), TW (2013) | Acute respiratory symptoms and Influenza-like illness |
3/0 |
| H7N2 | US (2002–2003), UK (2007) | Conjunctivitis, mild influenza-like illness | 4/0 |
| H7N3 | IT (1999–2003), CA (2004), UK (2006), MX (2012) | Conjunctivitis, no fever, respiratory symptoms | 12/0 |
| H7N7 | US (1959,1979), AU (1977), UK (1996), NL (2003) | Conjunctivitis, influenza-like illness, fever, pneumonia | 90/1 |
| H7N9 | CN (2013–2015), HK (2013), TW (2013), CA (2015), US (2015) | Acute respiratory distress syndrome and multi-organ failure | 678/271 |
| H9N2 | CN, HK (1998–1999, 2003, 2007, 2009), BD (2011) | Low fever, headache, sneezing, runny nose, vomiting, influenza-like illness | 16/0 |
| H10N7 | US (1991), EG (2004), AT (2010) | Acute respiratory symptoms | 10/0 |
| H10N8 | CN (2013–2014) | Severe pneumonia | 3/0 |
Abbreviations: AZ, Azerbaijan; AT, Austria; BD, Bangladesh; KH, Cambodia; CA, Canada; CN, China; DJ, Djibouti; EG, Egypt; HK, Hong Kong Special Administrative Region of China; ID, Indonesia; IQ, Iraq; IT, Italy; LA, Laos; MX, Mexico; MM, Myanmar; NL, Netherland; NG, Nigeria; PK, Pakistan; TH, Thailand; TR, Turkey; TW, Taiwan; UK, United Kingdom; US, United States; VN, Vietnam.