Between 10 and 20% of people with SARS complain of diarrhea. One study found that diarrhea, if it occurs, usually appears between seven and eight days after diagnosis. Episodes of diarrhea may occur only a few times per day or as often as 20 times daily. The diarrhea may be watery or partially formed and is due to the virus's effects on the digestive tract. Diarrhea is more common in people who are hospitalized for SARS. The virus can also be transmitted through contact with an infected person's feces.

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