Influenza Pandemics / Avian Influenza
An influenza pandemic occurs when a new strain of influenza virus emerges, spreading around the globe and infecting many people at once. An influenza virus capable of causing a pandemic is one that people have no natural immunity to, can easily spread from person to person, and is capable of causing severe disease in humans. This webpage contains information for the general public and health professionals on pandemic influenza.
Influenza Pandemics are associated with high morbidity, excess mortality, and social and economic disruption. We have experienced three such pandemics in the twentieth century: in 1918 (Spanish Influenza), 1957 (Asian influenza) and 1968(Hong Kong Influenza) Viewed against this historical background, the 2004 outbreaks of highly pathogenic H5N1 avian influenza are clearly a cause for concern, as it is feared that the H5N1 virus may demonstrate considerable pandemic potential.
The threat of Avian Influenza does not lessen the benefits of routine vaccination against known human strains. Dr Alan Hampson, Deputy Director of the WHO collaborating Centre for Reference and Research on Influenza in Melbourne said "there may be extra benefits from following the usual indications for vaccination. It can reduce the reservoir of human viruses available for mixing with the avian strain" 8
8. Influenza 2004; a guide for occupational health professionals. Influenza Specialist Group. Burson Marstellar