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Home Q & A Board Science-Related Homework Help Psychology
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Valvarez Valvarez
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6 years ago
Allergic reactions are
 
  A) a result of digestive system dysfunction.
  B) an abnormal immune system reaction to a foreign substance.
  C) caused by viruses.
  D) more common in people whose immune systems are not fully functional at birth.
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Ca1234Ca1234
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#1
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6 years ago
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Valvarez Author
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6 years ago
Brilliant ツ
hannahspillett
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Yesterday
This helped my grade so much Perfect
jblazah
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2 hours ago
Thanks for your help!!
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