Table 3.

Common word matrix of high-frequency keywords (part).

Rank	Keywords	Frequency	Rank	Keywords	Frequency
1	Public health	347	9	Knowledge	44
2	COVID-19	347	10	Prevention	43
3	Epidemiology	168	11	Risk assessment	43
4	Disaster	62	12	Emergency management	43
5	Emergency department	54	13	Climate change	42
6	Health policy	54	14	Education	40
7	Primary care	51	15	Emergency preparedness	40
8	Management	50	16	Mental health	39