“…A total of 26 studies reported the prevalence of HIV, HBV, HCV, drug use, opium, cannabis, alcohol, tobacco smoking, sexual abuse, and sexual contact in street children, but eight studies reported duplicate data, and we removed these studies. Finally, 18 studies were included in this systematic review and meta‐analysis, 12 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 (Roshanfekr et al, unpublished) (Figure 1 ).…”