where nations around the world pursue a using tobacco cessation tactic utilizing e-cigarettes, to carefully weigh national instances and the risk of uptake, and exhaust other established cessation procedures. 突发卫生事件 新闻和特写 疾病爆发新闻 情况报告 世卫组织在紧急情况下 数据 这些建议由世卫组织药