More than 30% of patients present with gastrointestinal symptoms such as diarrhea and vomiting.
Ushahidi wa kifilogenetiki umeonyesha kwamba popo na wanyama wagugunaji hutumika kama vyanzo vya jeni ya alpha-CoV na beta-CoV nyingi, huku ndege wakiwa ndio wahifadhi wakuu wa gamma-CoV na delta-CoV.