Abstract：Objective To investigate the epidemiological characteristics of influenza in Huizhou City, Guangdong Province during 2012-2014 so as to provide scientific evidence for influenza prevention and treatment. Method We retrospectively analyzed the network reported data of influenza in Huizhou City, Guangdong Province from January 2012 to December 2014. Results A total of 10,650 influenza cases were cumulatively reported from January 2012 to December 2014, of which the number of the reported cases in 2012, 2013 and 2014 was 1,000, 1,825 and 7,825 respectively. There were 6,161 (57.85%) male cases and 4,489 (42.15%) female cases, with the male-female sex ratio of 1.37:1. The gender proportion of the influenza cases in Huizhou during 2012-2014 indicated that male cases were more than female cases, with statistically significant differences among different years (χ2=46.969, P<0.001). Most of the cases were children aged 0-4 years, accounting for 59.11% (6,295/10,650). The top 3 age groups in rank order of proportions of influenza cases during 2012-2014 were the age groups of 0-4, 5-24 and 25-59 years. The proportions of influenza cases in different years and different age groups showed statistically significant differences (χ2=281.95, P<0.001). Huicheng District, Boluo County and Huidong County had the most reported cases, accounting for 47.32%, 29.74% and 9.67% respectively. The reported cases of influenza in Huicheng District, Boluo County, Huidong County and Longmen County during 2012-2014 showed an increasing tendency. There were statistically significant differences in the proportions of influenza cases of different districts (counties) in 2012-2014 (χ2=175.579, P<0.001). The reported cases were higehr in preschoolers than in other populations, accounting for 68.34% (7,278/10,650). The proportions of influenza cases of different occupation populations in 2012-2014 showed statistically significant differences (χ2=162.638, P<0.001). Conclusions The population, time and region distribution features of influenza cases in Huizhou in 2012-2014are obvious. Children aged 0-14 years are the high-risk population for influenza. The incidence is higher in the males than in the females, and most of the cases are the scattered children. Huicheng District, Boluo County and Huidong County where the population densities are all larger are the regions with high incidence.
2017, Vol. 24 
