Epidemiological characteristics of measles in Jinshan District of Shanghai from 2004 to 2015
Objective 
To analyze the epidemiological characteristics of measles in Jinshan District of Shanghai from 2004 to 2015 in order to provide guidelines for measles control. 
 
 
Methods 
A descriptive epidemiological analysis was conducted on measles cases reported in Jinshan District during 2004 to 2015. Epidemiological data of those cases were collected from surveillance system of infectious disease, Measles Surveillance System (MSS) and case study records. 
 
 
Results 
A total of 225 confirmed measles cases were analyzed in this study with an annual incidence of 2.66/100 000. The highest incidence was 11.27/100 000 in 2005 and the lowest incidence was 0.14/100 000 in 2011, taking on a descending trend (Z=-6.689, P<0.000 1). The number of cases from March to May accounted for 65.33%. The incidence of measles in floating population (4.00/100 000) was higher than that in resident population (2.18/100 000) (χ2=20.467, P<0.000 1). The measles cases mainly concentrated in age groups of ≥20 years and <5 years. Workers, scattered children, domestic workers, farmers and fishermen had high incidences of measles. Measles vaccine immunization history was clear in nine cases. 
 
 
Conclusion 
The incidence of measles in Jinshan District shows a general trend of decline in this decade with time and population clusters in occurrence, suggesting that the occurrence of measles in Jinshan is under control. It is necessary to strengthen measles surveillance, regular immunization among children and supplementary immunization among adults, especially in floating population, in order to maintain high levels of immune protection. 
 
 
Key words: 
Measles; Incidence; Epidemiological characteristic