Abstract / Description
BackgroundHeilongjiang Province shares a 2,981-km border with the Russian Federation and runs the largest land-port network in China. The sheer volume and diversity of cross-border movement at these ports complicates infectious disease surveillance and control. Although some individual ports and pathogens have been examined separately, a province-wide integrated analysis spanning all 18 border port municipalities has been absent. This study aimed to characterise the notifiable-disease burden across those municipalities and to identify the diseases warranting priority attention.MethodsIndividual case records of notifiable infectious diseases reported between 1 January 2014 and 31 December 2023 were retrieved from China's National Infectious Disease Reporting Information Management System. We computed constituent ratios, crude incidence rates, and disease rankings. Joinpoint regression yielded annual percent change (APC) and average annual percent change (AAPC) estimates. Seasonality was characterised by the direct average seasonal index method. Between-group differences were evaluated with χ² or Fisher's exact tests. A two-tailed P 0.05), though respiratory diseases trended upward (AAPC 6.61%, P