While there is still debate over the exact origin of SARS, it may have come from the raising together of different types of animals in the Guangdong region of China, allowing heretofore separate animal viruses to exchange genes and create a killer.
做為二十一世紀打頭陣的新型微生物殺手，SARS 的病原來源至今仍在爭議中，推測是廣東地區水田及雞、鴨、豬、魚等各種養殖混雜，讓原本不相往來的病毒得以互換基因，從而產生可怕的變種。