How Sars was Started?

SARS (Severe Acute Respiratory Syndrome) is believed to have started in the country of China. The actual cause of SARS is not known at this time, but is believed to have started from birds or fowls where it jumped to pigs and then humans. It is known that annual influenza epidemics come from Asia and that the farming system in which duck ponds and pig farms in China exists in close proximity. This close proximity could provide an open-air laboratory in which new virus strains can be created.