Table 3.

The top 15 ranked feature words of 7 topics (Sina Weibo dataset). The abbreviation No. represents the topic identification number

No	Feature words	Name
1	Prevention; Control; Measures; Service; Community; Management; Leading group; Emergency; In order; The public; Residents; Disinfection; Staying home; Materials; School	Community prevention and control
2	Masks; Vaccines; Research; Transmission; Zhong Nanshan; Drugs; Team; Clinical trials; Biology; Antibodies; Disinfection; Infection; Experts; Clinical; Medical	Drug test
3	Patient; Cases of disease; Hospital; Test; Discharge; Nucleic acid; Report; Symptom; Cause; Positive; Viral; Medical institution; Antibody; CDC; Sample	Virus detection
4	Wuhan; China; Fight; Medical staff; Supplies; Medical team; Heroes; Protect; Doctor; Cooperation; Frontier; Police; Success; Assistance; Nurse	Fight for epidemic
5	Influence; Economy; Company; Enterprise; Market; Loan; Production; Industry; Price; Employee; Consumption; Shock; Investment; Tourism; Unemployment	Epidemic impact
6	United States; Global; Japan; Trump; United Kingdom; Italy; WHO; News; Korea; France; Russia; Spain; Measures; Europe; World	International epidemic
7	Court; Guardian; Illegal; Public welfare; Foundation; Evidence; Case; Law; Epidemic area; Monitoring; Institution; Lawyer; Judicial; Trial; Fair	Laws