I. General Situation of the Epidemics
In the 15th week of 2009 (from April 13 to April 19), 2,839 cases of 17 kinds of legally defined infectious diseases and 4 dead cases (namely 2 cases of hepatitis B, 1 case of HIV/AIDS, and 1 cases of tuberculosis) were reported in 18 districts and counties in the whole city. Among them, there are 1043 cases of 11 types of class B infectious diseases, up 24.61％ from last week and down 8.91％ from the same period of last year. The top five categories of diseases with the highest incident rates are: diarrhea, tuberculosis, hepatitis B, measles and syphilis; 1,796 cases of 6 kinds of class C infectious diseases were reported, up 10.59％ from the last week and up 55.23％ from the same period of last year.

II. Analysis of the Major Epidemics

(1) Measles
This week 93 cases were reported in the city, down 10.58% from last week and down 5.10% from the same period of last year. Among them, the top three districts and counties with the most reported cases are: Chaoyang, Daxing and Haidian, accounting for 62.37% of the total number. Those infected are mainly scattered-living children, housekeeping staffs, unemployed people, workers and cadres. They take up 65.59% of the reported patients.

(2) Chicken Pox
This week 563 cases were reported, up 8.90% from last week and up 23.46% from the same period of last year. The top three districts and counties with the most reported cases are: Fengtai, Chaoyang, Haidian, Changping and Tongzhou, accounting for 62.70% of the total number. Those infected are mainly students and preschool children. They take up 82.59% of the reported patients.

(3) Hand-foot-mouth Disease
This week 817 cases were reported, up 9.22% from last week. The top three districts and counties with the most reported cases are: Fengtai, Daxing, Haidian, Chaoyang and Tongzhou, accounting for 65.97% of the total number. Those infected are mainly scattered-living children and kindergarten kids. They take up 93.27% of the reported patients.

IV. Key Notes
This week, hand-foot-mouth disease had a slight increase from last week. The relevant departments still need to attach great importance to and seriously implement the prevention and control work requests issued by City Health Bureau.
Since April, with the weather turning warm, the reported case number of intestinal infections began to increase. Health departments at all levels should intensify the law enforcement of food and catering industry to ensure the food safety. Disease control departments at all levels and intestinal outpatient departments should actively do a good job of intestinal canal infectious diseases monitoring, reporting and prevention; actively promote knowledge of food hygiene to enhance people's sense of self-protection and develop good hygiene practices.