The number of people allergic to peanuts has been decreasing recently.
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Q20: Antibodies are
A) proteins secreted by activated B
Q21: Immunosuppressive drugs are given to people after
Q22: During a second pregnancy,when is the Rh
Q23: How is hemolytic disease of newborns prevented?
A)
Q24: The A and B antigens are the
Q26: Anaphylactic shock can lead to death.
Q27: The United Network of Organ Sharing considers
Q28: HIV infects and kills _ cells.
A) bacterial
B)
Q29: This results when the immune system overreacts
Q30: HIV can be transmitted through
A) food.
B) water.
C)
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