<prompt> H5 Nl may be best described as a:Bird flu virusVaccine for HIVAgent for Japanese encephalitisNew strain of Plasmodium falciparum  <response>: H5N1 is the An Flue a type of Influenza A virus, also called the Bird Flu Virus. Ref: Molecular Medicine: An Introductory Text By Trent, 3rd Edition, Pages 209-10; Clinical Infectious Disease By Schlossberg, 2008, Page 1290 