Review Article
The Modes of Evolutionary Emergence of Primal and Late Pandemic Influenza Virus Strains from Viral Reservoir in Animals: An Interdisciplinary Analysis
Table 5
Antigenic subtypes of influenza A viruses that naturally infected man (based on various data presented above).
| | Antigenic subtype | Mode of occurrence | Place of occurrence |
| | H1N1 | Pandemic | Worldwide | | H2N2 | Pandemic | Worldwide | | H3N2 | Pandemic | Worldwide | | H2N8 | Pandemic | Worldwide | | H3N8 | Pandemic | Worldwide | | H1N2 | Epidemic (in 2001); sporadic | America, Asia, and Europe | | H1N3 | Singular | Azerbaijan | | H5N1 | Sporadically ongoing | Eastern Hemisphere | | H7N2 | Singular | USA | | H7N3 | Singular | Canada | | H7N7 | Limited epidemic | The Netherlands | | H7N7 (further cases) | Singular | UK, USA (seal originated) | | H9N2 | Sporadic | China, Hong-Kong, and Bangladesh | | H10N7 | Singular | Egypt |
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