但解决这个问题让我们面临比上世纪成功的公共卫生干预政策更为艰巨的挑战，包括普及接种、饮用水加氟和机动车安全规则问题。
Yet solving it poses much more difficult challenges than the kind of successful public-health interventions of the last century, including near-universal vaccination, fluoridation of drinking water, and motor-vehicle safety rules.