Influenza A (H1N1) in 2009 is a pandemic caused by a variant of influenza virus of swine origin (subtype H1N1).
Swine flu (or influenza, or the new influenza A/H1N1, and seasonal influenza (H1N1 and H3N2)) is a disease of the airways, is highly contagious, but usually with low mortality. Transmission occurred pig to man, what is worrying is that now is able to spread from person to person.
It is considered that the severity of influenza is related to the severity of the diseases that have been infected or age.
On June 11, following a surge of cases in a third continent (Australia, after the United States and Europe), WHO declared that the world faces a pandemic or an outbreak of influenza worldwide. Level 6 is an indication of the spread of the disease, its severity, which is currently defined moderate.
