Inaccessibility of vulnerable populations is most often cited as a barrier to effective prevention by countries in regions where the epidemic is closely linked to injecting drug use, such as Asia and Eastern Europe.
在那些该流行病与注射毒品使用密切相关的地区的国家，例如亚洲和东欧国家，无法帮助易受感染群体是影响有效的预防努力的一个最常见障碍。