Not to rip on AmandaRxs, but we should know the facts about the transmission of hep B virus. Like all the previous posts said, it's not necessarily only through "IV needle sharing among drug users, dirty piercing/tattoo parlors, hospital needle sticks, unprotected sex." It is one the most common virus infection found in China and can be transmitted through sharing the same plate of food or using unwashed untensils. If you brush your teeth hard enough, you can cut your gums and transmit the virus that way. That's why it is now mandatory to have hep B vaccination for all elementary students and beyond.