While injection of heroin is not the norm in African countries, there is growing evidence of pockets of heroin injection in urban centres (e.g. in Kenya, Nigeria and the United Republic of Tanzania).
注射海洛因在非洲国家并非常事，可是有越来越多的证据表明城市中心有海洛因注射窝点（如肯尼亚、尼日利亚和坦桑尼亚联合共和国）9。