Which of these is an example of active immunity?
a) a pregnant woman passing antibodies to the fetus across the placenta
b) a pregnant woman giving antibodies to an infant through breast milk
c) a person developing antibodies against the measles vaccine
d) a person receiving antibody shots after being bitten by a rabid animal
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Which of these is an example of active immunity?
a) a pregnant woman passing antibodies to the fetu...
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