Questions: A person receiving an antiserum injection develops acquired passive immunity, while a fetus receiving IgG in utero from the mother develops acquired passive immunity.
Transcript text: A person receiving an antiserum injection develops $\square$ acquired passive immunity, while a fetus receiving IgG in utero from the mother develops $\square$ acquired passive immunity.
Solution
A person receiving an antiserum injection develops artificially acquired passive immunity, while a fetus receiving IgG in utero from the mother develops naturally acquired passive immunity.
Explanation:
Artificially acquired passive immunity occurs when a person is given antibodies through an external source, such as an antiserum injection. This provides immediate but temporary protection against specific pathogens.
Naturally acquired passive immunity occurs when antibodies are transferred from mother to fetus through the placenta, specifically IgG antibodies. This provides the newborn with temporary immunity to certain infections the mother has immunity against.