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Like other influenza viruses, it attacks the respiratory system. It causes the tissues to become inflamed and actually enters some of the cells of the host animal to cause them to reproduce the virus and stop working for the host. Then as the replicated virus particles are released from inside the cell, they split open the cell to get out and the cell is killed in the process.

The most harmful condition it can cause in an otherwise healthy adult, is secondary pneumonia which can be a critical condition. Also when too many cells are infected and killed, the body must recover from the loss of function of those cells. There can be stress on the kidneys trying to rid the body of the dead cells and excess proteins and other by-products of the infectious disease. Secondary infections such as bacterial or viral pneumonia can result in respiratory failure, septicemia (infection in the blood and whole body), and even death. Many worse problems can occur in those at higher risk for complications with underlying disease, etc. [see more on that in related questions below]

Luckily, the new virus was a relatively mild infection for most people, so the Death Rate was lower than initially feared by epidemiologists.

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13y ago

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