Viral hepatitis is still a serious medical and economic problem. Based on current diagnostic technologies six different types of hepatitis can be classified (A, B, C, D, E, G). Hepatitis F has been considered as separate type of hepatitis at the beginning, but now it is more and more clear Hepatitis F virus seems to be only subtype of already well known virus of Hepatitis B. Hepatitis are very important for health care administrators generally, but it depends on different type, subtype and occurrence in any particular part of the world. Of the clinical point of view Hepatitis B, C and D attract attention however the spread of Delta agent is very rare in the Czech Republic....

Keywords: Hepatitis A; Hepatitis B