HBV is very contagious to blood, so a goos advice will be that all your family should made a HBs screening and if they are not positive on the screening to receive a vaccine in order to be protected.
usually if a adult is infected with HBV it cure in 90% but if a newborn is infected (from mother) it will get chronic in 90% or if a child is infected also it will go chroninc in 70% or 60% depend on the age, so we can't know for sure from were we have it, and in this moment this is not something important
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