A Sero-epidemiological Investigation of Hepatitis in Haidian,2000

In order to search sanitation the strategy of the control of hepatitis A and to learn the present situation of vaccination, a sero-epidemiological investigation was made in October 2000. This investigation sruveyed 404 persons who were from different areas and floated in Haidian. Its natural infection rate of Hepatitis A was 62 95%, the highest 80.5% was in 24-24 years old group and the lowest 27.27% was in 5-9 age group. The natural infection rate of different region had not distinct diversity. The inoculate rate of Hepatitis A was 11.50%,and in 1-19 years age group was 17.70%.Both the natural infection rate in floatod people was increased with the age,the mean rate was 50% and the inoculation rate was 9.89%.From this investigation,it was confirmed that about 1/3 person in Haidian are susceptible to Hepatitis A,and children in 5-9age have not enough munity to Hepatitis A. Iconclu-sion,the epidemic possibility of Hepatitis A is still exist and people should put more attention to it.The prevention and control of Hepatitis A of flating people should be more ruled and strengthenest.