4WHO and CDC fact sheets,www. who.int and www.cdc,gov.
5Tadon BN, Acharya SK, Tadon A. Epidemiology of hepatitis B Vires infection in India [J]. Gut, 1996, 38(supp 12): 56-59.
6Corden S, Ballard AL, Ijaz S, et al. HBV DNA levels and transmission of hepatitis B by health care workers [J ]. J Clin Virol, 2003, 27: 52-58.
7Reingold AL, Kane MA, Hightower AW. Failure of gloves and other protactive devices to provent transmission of hepatitis B virus to oral surgeons [J]. JAMA, 1988, 259:2558- 2560.
8Mori M.Status of viral hepatitis in the world community: its incidence among dentists and other dental personnel [J]. IntDent J, 1984, 34: 115-121.
9McCarthy GM, Manandras AH, MacDonald JK. Infection control in the orthodontic office in Ganada [J ]. Am J Orthod Dentofacial Orthop, 1997, 112: 275-281.
10Thomas DL, Gruninger SE, Siew C, et al.Occupational risk of hepatitis C infections among general dentists and oral surgeons in North Aerica [J]. Am J Med, 1996, 100:41- 45.
7Martin AR, Moyes CD, Lucas CR, et al. Hepatitis B infection in households of HBsAg positive New Zealand children. N Z Med J, 1996,109:463-465.
8Noppompanth S, Sathirapongsasuti N, Chongsrisawat V, et al. Detection of HBsAg and HBV DNA in serum and saliva of HBV carriers. Southeast Asian .J Trop Med Public Health,2000,31:419-421.
9Luksami P, Maneesri P, Kittigul L. Hepatitis B seroprevalence and risk factors among school - age children in a low socioeconomic community,Bangkok. Asia Pac J Public Heaflh, 1995,8:158-161.
10Williams CA,Weber FT, McKim M,et al.Hepatitis B virus transmission in a public school: effects of mentally retarded HBsAg carrier students. Am J Public Health, 1987,77: 476-478.