婴儿继承母亲的免疫力，出生后不长的一段时间人通常受到保护，不受多种疾病的侵袭。

A baby usually is protected from many diseases for a short time after birth by an immunity inherited from his mother.

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Visvanathan博士：我们信赖常规免疫。所以当婴儿出生时接种疫苗后，实际上是不存在传染风险的。

Dr Visvanathan: We believe in universal vaccination, so providing the baby is vaccinated when it is born, the risk of transmission is in fact non-existent.

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