Question: does the presence of covid in anal swabs determine how severe it is
Answers: digestive tract might be one extrapulmonary site for virus replication, in the anal swab cohort (figure 1 (b)), 11 of 28 cases were detected to be anal swab positive, 8 of them (72.7%) were with severe symptoms, which was significantly higher than that 4 (23.5%) of the rest 17 cases without detectable virus in anal were severe cases