We all know that HBV (Hepatitis B virus) is a blood-borne disease, mainly transmitted through blood (such as unsafe injections, etc.), mother-to-child and sexual contact. HBV is not transmitted through the respiratory and digestive tracts, so daily study, work or living contacts, such as working in the same office (including common computers and other office supplies), shaking hands, hugging, living in the same dormitory, eating in the same restaurant and sharing toilets, etc., without blood exposure, generally do not transmit HBV. Epidemiological and experimental studies have also not found that HBV can be transmitted by blood-sucking insects (mosquitoes, bedbugs, etc.). However, there are some specific conditions under which HBV can be transmitted, such as: blood injected with HBV, unclean syringes, hepatitis B virus on the instruments used for tooth extraction, saliva with HBV that is attached to a healthy person’s body in a damaged area and enters the bloodstream, healthy people may be infected with HBV. In the case of kissing or hugging with a lover, the infection may be caused by the breakage of the mucous membrane of the skin, except for these specific cases where contact with the objects of a hepatitis B patient does not generally lead to hepatitis B infection. Therefore, in order to better prevent hepatitis B infection, it is important to pay attention not to use instruments used by hepatitis B patients, such as toothbrushes, razors, utensils, etc., and to prevent contact between the two parties when their skin is broken. If you are a family member, friend, colleague or frequent contact of a hepatitis B patient, the most effective preventive measure is to get vaccinated against hepatitis B to produce antibodies in your body, which can effectively prevent and resist infection with hepatitis B.