Edmond医生问 :为安全起见 ,美国卫生和人类服务部已开始对部分医务人员接种天花疫苗的计划。这部分人群可达 50万人。对于免疫成人的危险性 ,已在近期出版物上作了充分讨论。但是理论上对成人接种者 (其中许多是医务人员 )的子女意外传播牛痘的危险性有多少 ?　　 Cherry医生 Dr. Edmond asks: For the sake of safety, the U.S. Department of Health and Human Services has started a plan to vaccinate some of its medical staff against smallpox. This part of the population up to 500,000 people. The dangers of immunising adults have been well discussed in recent publications. But how much of the risk of accidentally transmitting vaccinia to children of adult vaccinates, many of whom are medical workers, theoretically? Dr. Cherry