Experts at the Centers for Disease Control and Prevention say hospital treatment for likely H1N1 is most common among children up to four years old.

VOA: special.2009.11.24

So the problem of infectious disease prevention and treatment isn't solved yet, you know this, right?

传染病预防和治疗的问题,现在仍然没有解决,你们应该了解,对吧

耶鲁公开课 - 生物医学工程探索课程节选