because if the mother is infected with Hepatitis B then it will prevent her from passing it onto her child during childbirth and will prevent them from getting infected for the rest of their life
however, like other viruses that are transmitted through blood like HIV, there are really only three major risk groups: gay men, IV drug users, and blacks
the real question is why does a child born to a non-black woman who stays away from immoral activities need to receive the vaccine? the answer is that they probably don't, but Democrats have gotten in bed with pharma companies and have decided noticing that risk factors differ between groups of people is homophobic and racist. so they continue to put out misleading information that pretends that a white straight couple is just at risk for blood borne diseases as a gay black drug user. another legacy of Fauci