If parents or parents-in-law are hepatitis B virus carriers, will they infect their children if they take care of them? By what means?

The spread of infectious diseases requires three links: the source of infection, the route of transmission and the susceptible population; the spread of hepatitis B is: (1) blood spread, that is, through transfusion of blood or blood products or the use of Hepatitis B virus is transmitted by syringe injection, which is the main way of transmission; (2) body fluid transmission, that is, through sweat, urine, saliva, semen and vaginal secretions; (3) sexual transmission, through sexual contact Transmission; (4) Close contact transmission, that is, transmission through close skin contact; (5) Gastrointestinal transmission. (2)(3)(4)(5) Transmission routes require susceptible people to have damaged skin or mucous membranes at the virus contact site. This situation can be spread if the child does not have antibodies. Taking medicine before the examination has no effect on the results, and there are no medicines for this purpose.

Therefore, which statement has no theoretical basis!