Analysis on epidemiological characteristics of 4 species natural-focal diseases in Shandong Province, China in 2009-2017: a descriptive analysis

Abstract

18Background: Natural-focal diseases have always been a kind of serious disease that endangers 19 human health. It threatens about 100 million people in Shandong Province, and causes illness in 20 thousands of people each year. However, information on the epidemiological characteristics of 21 natural-focal diseases in Shandong Province has been limited. The purpose of the study is to describe 22 and analyze the epidemiological characteristics of natural-focal diseases in Shandong Province,