Table A.

Keywords list used to collect data for OMC and OMS

	Chinese	English
1	发热*/发烧/高烧/低热/低烧	Fever
2	咳嗽*/干咳	Cough
3	咽痛*/喉咙痛	Pharyngalgia
4	胸闷*/胸痛	Chest tightness
5	呼吸困难*/呼吸急促/气短/气促	Dyspnea
6	乏力*/四肢无力	Fatigue
7	肌肉酸痛*/肌痛/四肢酸痛	Myalgia
8	恶心*	Nausea
9	呕吐*	Vomiting
10	腹泻*/拉肚子	Diarrhea
11	嗜睡*	Somnolence
12	惊厥*	Convulsion

^⁎Core keyword was used to query with Baidu Index.