Abstract
This article has no abstract.
Highlights
Influenza A and influenza B viruses are the two types of influenza viruses which cause human epidemic disease
Influenza A virus affecting humans has traditionally been classified into three subtypes based on the H antigen (H1, H2, H3) and two additional subtypes based on the N antigen (N1, N2)
Two cases of confirmed H5N1 influenza occurred in Hong Kong in February 2003, resulting in one death
Summary
Influenza A and influenza B viruses are the two types of influenza viruses which cause human epidemic disease. Most influenza viruses cause asymptomatic or mild infection in birds; the range of symptoms in birds varies greatly depending on the strain of virus. Avian influenza strains were first reported from Hong Kong [11] during the 1997-1998 influenza season and were shown to be derived from avian sources without genetic reassortment between avian and human influenza viruses [11].
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
