Objective To master the epidemiological characteristics and outbreaks of acute hemorrhagic conjunctivitis (AHC) in China from 2013 to 2019, so as to provide scientific basis for improving disease surveillance system and making prevention and control measures.
Methods Retrospective epidemiological analysis and statistical tests were conducted on the surveillance data of AHC reported in China. The characteristics and causes of each outbreak were summarized.
Results From 2013 to 2020, a total of 289 518 AHC cases were reported. The annual incidence was 2.63/100 000. There are 2 incidence peaks occurred in 2014 and 2019. The reported incidence increased by 19.11% in 2014 compared with 2013, and 8% in 2019 compared with 2018. The annual incidence peak was in the 0–9 age group during June-September. The proportion of people over 50 years old was increased in recent years. The male to female ratio of the cases was 1.18: 1. The first 7 provinces (municipality) reporting high incidences were Guangxi, Guangdong, Anhui, Hubei, Yunnan, Henan, Hebei province. From 2013 to 2020, 38 outbreaks of AHC were reported in China, of which 35 occurred in schools, 2 in villages and 1 in community. The most outbreaks occurred in Yunnan.
Conclusion The AHC epidemic was confined in China from 2013 to 2020 despite 2 incidence peaks in 2014 and 2019. In 2020, the number of reported cases decreased significantly due to the epidemic control measures of COVID-19. Schools, villages and other population gathering places are still the focus of prevention and control of AHC. The increasing trend of proportion of middle-aged and elderly people also suggests that the spread of AHC presents new characteristics with the development of society. And continuous attention should be paid to pathogen analysis and other measures.
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