Key shift of national health strategies in the UK and the US under the impact of emergent public health events and its enlightenment for China

Facing with the growing health demands of the people, governments of all countries would promote national health to the level of national strategy, with the national health strategies of the United States and the United Kingdom being the most representative. Based on the theoretical framework of the political systems theory in this paper, we analyze policy texts relevant to health strategies of the two countries in recent years; we also conduct analyses on the semantic network, word frequency of the policy texts in different periods and co-word matrix of the policy documents to interpret the shift of health strategic priorities and the adjustment of measures in the United Kingdom and the United States under the impact of public health emergencies, and then deduce future development direction of the health strategies of the two countries. The study is intended to provide a reference for achieving the strategic goal of Healthy China Initiative.