Epidemiological Analysis of Virus Hepatitis A and B between 1990 and 2004 in Xihu District of Hangzhou City

Objective The present study was conducted tO understand the epidemic situation of virus hepatitis A and B between 1990 and 2004 in Xihu District of Hangzhou City．Methods The data of epidemic situation of hepatitis A and B from 1990 to 2004 were generally analyzed with Mi-crosoft Excel 2000．Results The average prevalence rate of hepatitis A was 29.38 lakh．Mortality rate 0.05 lakh．Fatality rate 0.16％．The epidemic trend of hepatitis A remarkably declined from 1990 to 2004．The average prevalence rate of hepatitis B was 85.26 lakh．Mortality and fatality rate were O.21 lakh and 0.24％respectively．The epidemic trend of hepatitis B stably declined for a period of 15 years．Conclusion It had a degressive trend in virus hepatitis epidemic from 1990 to 2004 in Xihu District．A high peak of virus hepatitis was mainly influenced by virus hepatitis A and B in 1990．The virus hepatitis B had been predominant from 1991 to 2004．The vaccinations of virus hepatitis A and B were major means to decrease the prevalence of virus hepaitis．