Short-lived immunity acquired from mother to foetus through placenta or to the infant through mother's milk is categorized as
A
Active immunity
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B
Passive immunity
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C
Cellular immunity
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D
Innate non-specific immunity
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Solution
The correct option is B Passive immunity Passive immunity is the transfer of active humoral immunity in the form of ready-made antibodies from one individual to another as in the case where the antibodies are transferred from the mother to the fetus across the placenta or to the infant through breast milk. So, the correct answer is option B.