Gripe aviar / Avian influenza

ABSTRACT

This report describes the current status of avian infuenza. Three major classes of influenza viruses are recognized A,B and C. Influenza C is a relatively minor cause of respiratory illness, but influenza A (mainly) and B strains (less severe) are major cases of morbidity and mortality. Each tends to occur in well-circumscribed epidemies. Spread of influenza is virtually worldwide after introduction of a new variant. Pandemia of influenza is one of the more important woldwide event of public health, in which the majority of the populations present the risk of infection and thus become sick. Vaccination constitutes the main medical intervention to protect people against the pandemic strain. These considerations are describes in the article