Hepatitis B incubation period vaccination generally can not play a blocking effect. Hepatitis B incubation period refers to the period from the invasion of the hepatitis B virus to the appearance of clinical symptoms, although there are no clinical symptoms after infection with the hepatitis B virus, but at this time the virus has already begun to replicate, and the vaccine will not play a role in clearing the effect of the virus. The best blocking time after exposure to hepatitis B is within 2 hours after exposure. Patients who have not been vaccinated against hepatitis B need to be injected with hepatitis B immunoglobulin according to the prescribed dosage at this time, and then vaccinated with hepatitis B vaccine in different parts of the body, and then the second and the third vaccination respectively after a period of time interval. Hepatitis B vaccine can be used to prevent hepatitis B and is not contagious itself. It can stimulate the body’s immune system after vaccination and play a role in protecting the body. Therefore, it is recommended to get vaccinated against hepatitis B at an early stage, and if you have already reached the latent stage of hepatitis B, vaccination is ineffective.