The unpredictable and unstable nature of public health emergencies and the complexity of public information dissemination have put forward higher requirements for public information dissemination.Therefore

it is important to deeply study the public risk perception in public opinion guidance during health emergencies.In this study

the existing literature is summarized and analyzed in five aspects:recipients of information

senders of information

information content

media/communication channels

and effects.The databases searched in this study include Chinese full-text journal database

Wanfang data resource system

VIP full-text Chinese science and technology journal database

Zhangqiao database

Web of Science

and Pub Med.A total of 542 articles were retrieved

and then 37 were extracted based on the titles

abstracts

and full-text contents

including a total of 17 Chinese and 20 foreign language papers.Analysis of the literature shows that at the early stage of an epidemic outbreak

the public should be actively provided with scientific answers and explanations

so that the public have the basic knowledge of the epidemic and agree to understand governmental measures.This will help reduce public panic caused by information asymmetry and alleviate the physical and psychological discomfort of the public.