I. General Situation of the Epidemics
In the 18th week of 2009 (from May 4 to May 10), 3,303 cases of 16 kinds of legally defined infectious diseases and 2 dead cases (namely 1 case of hepatitis B and bacillary dysentery) were reported in 18 districts and counties in the whole city. Among them, there are 1137 cases of 10 kinds of type B infectious diseases, up 20.83％ from last week and down 27.07％ 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; 2,166 cases of 6 kinds of type C infectious diseases were reported, up 16.02％ from the last week and down 32.54％ from the same period of last year.

II. Analysis of the Major Epidemics

(1) Measles
This week 72 cases were reported in the city, down 5.26% from last week and 13.25% from the same period of last year. Among them, the top three districts and counties with the most reported cases are: Chaoyang, Haidian and Daxing, accounting for 63.89% of the total number. Those infected are mainly scattered-living children, housekeeping staffs, unemployed people and students. They take up 59.72% of the reported patients.

(2) Chicken Pox
A total of 584 cases were reported this week, up 24.79% than last week and 9.57% than the same period of last year. The top 5 districts and counties with the most cases are Chaoyang, Haidian, Fengtai, Changping and Tongzhou, accounting for the 67.47% of the total reported cases. The infected are mainly students and preschool children, accounting for the 79.97% of the total.

(3) Hand-foot-mouth Disease
This week, 1001 cases were reported, up 8.69% from last week and down 37.48% from the same period of last year. The top 5 districts and counties with the most cases are Fengtai, Tongzhou, Chaoyang, Changping, Haidian and Daxing, accounting for the 66.23% of the total reported cases. The infected are mainly scattered-living children and kindergarten kids, accounting for the 93.31% of the total.

III. Key Notes
On May 8, 2009, the Ministry of Health researched and formulated an "A/H1N1 Flu Treatment Program (The First Edition of Pilot Version in 2009)" in accordance with the latest treatment experience and relevant information on A/H1N1 flu of World Health Organization and other countries. Beijing Municipal Health Bureau urged all levels of medical institutions to do a good job in the diagnosis and treatment of A/H1N1 flu in accordance with the program and timely report suspected cases and confirmed cases.

As summer approaches and temperature rises, the overall incidence of infectious diseases this week had a slight increase from last week, which mainly results from the large increase of intestinal infectious diseases. Thus, the Beijing Municipal Health Bureau urged the city to do a good job in the prevention and control of summer intestinal infectious diseases. Moreover, our city now has entered a high incidence period of hand-foot-mouth disease, and the number of reported cases showed a gradual upward trend. The health and epidemic prevention departments at district and county levels should strengthen collaboration with other relevant government departments to do a good job in the prevention and control of diseases with scattered-living children in addition to the childcare institutions and schools; at the same time, government departments should strengthen the implementation supervision of prevention and control measures for hand-foot-mouth disease to do a more down-to-earth work.