Table 1. Gender, medical problems, COVID-19 infection and smoking status of 18–23 year old persons in 43 countries (n = 5,342).

Factors		N (%)
Gender	Male	2,219 (41.5)
	Female	3,123 (58.5)
Has medical problems	Yes	716 (13.4)
	No	4,626 (86.6)
Infected with COVID-19	Yes	434 (8.1)
	No	4,908 (91.9)
Current smokers	Yes	657 (12.3)
	No	4,685 (87.7)