Table 1.

Top topics related to e-cigarettes before and after the Food and Drug Administration flavor enforcement policy.

Time frame and topic			Tokens, n (%)		Keywords
Before the announcement (n=644,686)
	Stop vaping and smoking to protect health	201,142 (31.20)		vape, vaping, lung, smoke, get, go, people, stop, cancer, health
	New e-cigarette flavor use among friends	158,593 (24.60)		vape, new, ude, level, link, case, dear_ncan, space_nasking, use, friend
	Single Juul pod equals a pack of cigarettes	153,435 (23.80)		juul, hit, be, pod, say, still, stare, go, iterally, single
	Vaping leads to nicotine addiction for those who unlikely smoke	131,516 (20.40)		smoking, cigarette, generation, whole, create, first, start, addiction, unlikely, statistically
Between the announcement and implementation (n=702,488)
	Ban on flavored tobacco products due to lung disease	231,119 (32.90)		vaping, vape, cigarette, smoking, product, flavor, ban, quit, lung, people
	Ways to buy vaping products	174,920 (24.90)		vape, would, buy, get, think, shop, go, need, take, look
	Time to stop vaping and smoking	167,192 (23.80)		smoke, time, vape, juul, stop, early, good, hit, read, drink
	Epidemic of teenager vaping	129,258 (18.40)		vape, kid, school, new, vapefam, high, top, epidemic, give, vaper
After the implementation (n=994,486)
	Vaping and smoking have risks to get COVID-19	354,037 (35.60)		vape, vaping, smoking, smoke, want, could, know, risk, covid, people
	Buy Juul products through shipping	225,748 (22.70)		vape, juul, get, shop, keep, still, flavor, product, sure, ship
	Intention to stop vaping	210,831 (21.20)		take, vape, stop, late, note, dah, photo, see, guy, friend
	Vaping and corona virus can cause respiratory disease	202,875 (20.40)		go, lung, vape, virus, people, young, bro, respiratory, disease, affect