Infants can acquire passive immunity by ingesting breast milk.
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Q47: The immune system guards against pathogens.
Q48: White blood cells are known as antigens.
Q49: The two types of leukocytes are phagocytes
Q50: A person develops active immunity when antibodies
Q51: Passive immunity is long-lasting.
Q53: Antibiotics promote bacterial infections.
Q54: Antibiotics are specific to certain types of
Q55: A person who has been prescribed antibiotics
Q56: Altered bacteria cause infections that can be
Q57: Antivirals are effective for use during the
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