what is SARS viruses?
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A contagious and sometimes fatal respiratory illness caused by a coronavirus.
SARS appeared in 2002 in China. It spread worldwide within a few months, although it was quickly contained. SARS is a virus transmitted through droplets that enter the air when someone with the disease coughs, sneezes or talks. No known transmission has occurred since 2004.
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severe actue respiratory syndrome.
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