This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T, Subject name: Medicine
All except one are true for hepatitis B - 
Select and explain. 
A. Veical transmission more impoant than horizontal, B. Age of onset determines prognosis, C. Period of communiciability lasts several months, D. Vims can be found in blood I month before jaundice
A: Veical transmission more impoant than horizontal
Answer: A: Veical transmission more impoant than horizontal 
Explanation: The hepatitis B virus is spread when blood, semen, or other body fluid infected with the hepatitis B virus enters the body of a person who is not infected. People can become infected with the virus from: Exposure to blood from needlesticks or other sharp instruments of an infected person. but most of the exposure occurs through direct contact .( Exposure to needles ,and body fluids) Ref Davidson edition23rd pg 877