(a) H1N1
(b) H5N1
(c) H3N2
(d) H7N9
Ans.(b)
Sol. The H5N1 subtype of Avian Influenza has raised concerns due to its high pathogenicity and potential for causing a global pandemic if it acquires the ability for sustained human-to-human transmission.
Avian influenza is further classified on the basis of different hemagglutinin (H) and neuraminidase (N) proteins. Common subtypes include H5N1, H7N9, H9N2 . Which of the following subtypes of Avian Influenza has raised concerns about a possible global pandemic ?
