Hepatitis B is caused by the hepatitis B virus, which is tenacious and resistant to heat of 60 degrees Celsius for 4 hours. Hepatitis B is caused by Hepatitis B virus, Hepatitis B virus is tenacious, has a strong external resistance, for 60 degrees Celsius can withstand high temperature for 4 hours, generally by mother-to-child transmission, sexual transmission, blood transmission, etc., the blood if encountered with broken skin or mucous membranes can enter the human body, the transmission occurs. If the wound is stained with the coagulated blood of hepatitis B patients, although the blood coagulated, does not exclude the possibility of hepatitis B virus transmission, should not be taken lightly, first quickly rinsed with peroxyacetic acid and water, if possible, injected with hepatitis B immune globulin, hepatitis B vaccine. If the wound is stained with blood from a healthy person, it is not contagious to hepatitis B. However, it is better to disinfect the wound first to avoid infection, and go to the hospital for blood test if necessary. If the wound is stained with coagulated blood, you should go to the hospital and listen to the doctor’s advice and give the right treatment.