So the built environment, medicines, all those kinds of things, vaccines, those are all public health, and that's why public health is there, and you may not believe that it's that important, but we couldn't live without it.

所以建筑环境、药物、所有这些东西、疫苗，这些都是公共卫生， 这就是为什么公共卫生在那里，你可能不相信它有那么重要， 但我们离不开它。