The history of influenza virus A shows inconsistencies in monitoring

Professor Rambaut of the University of Edinburgh, together with Hong Kong and U.S. researchers, has traced the history of the H1N1 virus and found its way of propagation.

Professor Rambaut used a technique of comparing whole genomes to understand the evolution of H1N1 virus. Before the epidemic outbreak in Mexico, the influenza virus A was already moved from pig to man for several months. The surveillance of influenza viruses circulating in pigs could then better identify and treat the virus when they are transmitted to humans.

If the virus is indeed a Mexican viruses of porcine origin, it is actually a combination of strains of avian influenza, human and swine. The subtype of swine influenza from which the virus is an H1N1 virus circulating for more than ten years.

The virus contains elements of Asian origin, which means that the precursor virus of influenza A have been circulating on the planet for at least a decade. The emergence of the virus has appeared several years after his suit, as for other influenza pandemics that have affected the 20th century.

This virus is new to the man who has no immune system to defend. That's why researchers stress the importance of monitoring influenza viruses circulating in pigs to better understand them before they affect humans.

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