Multiple cropping of second liver vaccine should the difference is treated

Should vaccinal second want multiple cropping after is liver vaccinal? When multiple cropping? Is its immunity protected period how long to have? This is the problem that everybody cares. The children that our country brings prefectural have an inoculation to pass second liver vaccine to Guangxi grand is followed 15 years visit observation to make clear, positive of antigen of surface of liver of vaccinal group second is led for 1.9% , contrast group for 16.7% , protective rate is 88.6% , group of the have an inoculation when 15 years antibody of 50.9% second liver is electropositive. The immune endurance that shows second liver vaccine can be as long as 15 years. Abroad also has similar story. After liver of second of African Senegal have an inoculation is vaccinal 12 years, positive of antigen of surface of liver of second of vaccinal group children is led for 2% , contrast group for 19% , protective rate is 88% , in the children of vaccine of vaccinal second liver 68% have second liver antibody. After vaccinal second liver is vaccinal, although be lengthened as time, vaccinal person antibody level year after year drops, but when they are atttacked by second liver virus, because immunity remembers effect, antibody level can lift once more. This is in area of second liver tall hair and tall danger crowd particularly apparent. Accordingly, from overall for, if be have an inoculation of vaccine of liver of whole journey second, produced the second liver antibody that Gao Di spends after have an inoculation, it is inside 10 years but not multiple cropping. But from individual for, every have an inoculation person the situation may be different, accordingly, should make concrete analysis to particular case. For example, vaccine of liver of whole nation second is vaccinal recently rate investigation makes clear, vaccinal rate is qualification of our country whole journey only 28.4% , 73.6% to be not whole journey have an inoculation. The children that is not whole journey have an inoculation may not have second liver antibody or antibody drop is spent inferior, should detect to this kind of children second liver antibody, did not arise like antibody or already disappeared, answer seasonable multiple cropping. Those who be worth to point out is: Although liver of second of vaccinal whole journey is vaccinal, the person that also have 10% have an inoculation of 5% ～ does not produce second liver antibody or the antibody that produce small drop to spend only, respondent to these notting have or low respondent children answer for many times vaccine of vaccinal second liver till antibody arises. In addition, to the children with high probability of virus of liver of second of a few infection, there is the person that second liver virus is carried in its parents or domestic member for example, should monitor its antibody level and quota of second liver infection regularly, once antibody falls,come to disappear low-level or completely, answer seasonable multiple cropping. Relevant knowledge: The immunity of reason second liver that have an inoculation of second liver vaccine fails prevents a guideline (the exercitation makes up arrest: Plum apricot)