Question
Would a five-month-old baby who has received two doses of the Hepatitis B vaccine get infected with the Hepatitis B virus after being kissed?
Answer
Given the prevalence of the Hepatitis B virus and its high resistance outside the body, the virus can remain infectious on surfaces at room temperature for up to six months. Therefore, children in normal social activities have almost daily opportunities to come into contact with the Hepatitis B virus. However, even so, only a few people will become infected, indicating that the transmission of Hepatitis B is not as easy as one might think. Additionally, children who have received two doses of vaccine are likely to have already produced antibodies. Medical Guidance: There is no need to worry about getting infected with Hepatitis B virus from being kissed. The person may not have Hepatitis B, and even if they do, the main route of transmission for Hepatitis B is not through the mouth. Even if a child’s mouth is damaged and the person is indeed infected with Hepatitis B, the chance of infection is low due to the vaccine. Even if antibodies have not yet been produced, there is a natural recovery possibility for Hepatitis B infection, not necessarily lifelong carriage.