Table 2.

Themes and topics of COVID-19–related tweets (N=13,937,906), n (%).

Theme and topics		Value
1. Source (origin)		966,372 (6.93)
	1.1 Outbreak	489,768 (3.51)
	1.2 Alternative causes	476,606 (3.42)
2. Prevention		1,076,840 (7.73)
	2.1 Social distancing	575,786 (4.13)
	2.2 Disinfecting and cleanliness	501,054 (3.59)
	3. Symptoms	558,332 (4.01)
4. Spread and growth		2,154,065 (15.45)
	4.1 Modes of transmission	472,749 (3.39)
	4.2 Spread of cases	617,946 (4.43)
	4.3 Hotspots and locations	459,039 (3.29)
	4.4 Death reports	604,331 (4.34)
5. Treatment and recovery		1,831,339 (13.14)
	5.1 Drugs and vaccines	442,413 (3.17)
	5.2 Therapies	483,109 (3.47)
	5.3 Alternative methods	416,530 (2.99)
	5.4 Testing	489,287 (3.51)
6. Impact on the economy and markets		2,858,316 (20.51)
	6.1 Shortage of products	513,703 (3.69)
	6.2 Panic buying	667,320 (4.79)
	6.3 Stock markets	535,262 (3.84)
	6.4 Employment	505,510 (3.63)
	6.5 Impact on business	636,521 (4.57)
7. Impact on health care sector		1,588,499 (11.4)
	7.1 Impact on hospitals and clinics	441,895 (3.17)
	7.2 Policy changes	615,027 (4.41)
	7.3 Frontline workers	531,577 (3.81)
8. Government response		1,559,591 (11.19)
	8.1 Travel restrictions	519,406 (3.73)
	8.2 Financial measures	485,277 (3.48)
	8.3 Lockdown regulations	554,908 (3.98)
9. Political impact		767,486 (5.51)
10. Racism		577,066 (4.14)