The possibility of hepatitis B virus infection cannot be ruled out if you get body fluids from a hepatitis B patient on your hand and touch the wound after half an hour. Hepatitis B virus is contagious and is mainly transmitted through mother-to-child, blood, sexual contact and daily life contact. Hepatitis B virus is a kind of virus with strong resistance to the external environment, hepatitis B patient body fluids may carry hepatitis B virus, contaminated with contact with the injured half an hour later, may be contaminated with the virus on the hand is still active, and at this time then touching the wound is likely to be infected. In this case, it is recommended to rinse and disinfect the wound and hands to maximize the removal of viral residues, and promptly go to the hospital for examination. If you have been vaccinated with hepatitis B vaccine and have a high antibody titer, you can reduce the risk of infection, but if your antibody titer is already very low, you need to get a booster shot of hepatitis B vaccine under the guidance of your doctor.