Influenza A (H1N1) 2009: a pandemic alarm.

ABSTRACT

At this critical juncture when the world has not yet recovered from the threat of avian infl uenza, the virus has returned in the disguise of swine infl uenza, a lesser known illness common in pigs. It has reached pandemic proportions in a short time span with health personnel still devising ways to identify the novel H1N1 virus and develop vaccines against it. The H1N1 virus has caused a considerable number of deaths within the short duration since its emergence. Presently, there are no effective methods to contain this newly emerged virus. Therefore, a proper and clear insight is urgently required to prevent an outbreak in the future and make preparations that may be planned well in advance. This review is an attempt to discuss the historical perspective of the swine fl u virus, its epidemiology and route of transmission to better understand the various control measures that may be taken to fi ght the danger of a global pandemic.