Why is the H1N1 virus that caused the death?

How about the metabolism in the human body? How does it affect our metabolic system?

World Health said that the flu caused by a new strain of H1N1 viruses from swine has been responsible for the pandemic Influenza 2009. This strain is commonly called "swine flu" by the media. All influenza A virus containing hemagglutinin and neuraminidase, but structures of these proteins differ from strain to strain, due to rapid genetic mutation in the viral genome. The virus was originally H1Y1 an unusual number of deaths, probably due, causing a storm of cytokines in the body. The flu virus is infecting swin lung cells, leading an overstimulation of the immune system by release of cytokines in the lung tissue. This leads to the extensive migration of leukocytes to the lungs, causing destruction of lung tissue and fluid secretion in the body. It is therefore difficult for the patient to breathe.