Viral hepatitis and precautions to be taken by health personnel.
D003428:Cross Infection / Q000517:prevention & control*; D006281:Health Occupations; D006506:Hepatitis A / Q000517:prevention & control*; D006509:Hepatitis B / Q000517:prevention & control*; D006801:Humans; D009784:Occupational Diseases / Q000517:prevention & control