Biology, 15.06.2020 20:57, doughboy123
Doctors often use certain medications to treat infections. A few people have a reaction to some of these medications, such as itching, swelling, or trouble breathing. This is an example of
1. using antibodies to cure a medical problem
2. the body's immune system overreacting to a usually harmless substance
3. the body creating a mutation to fight unknown pathogens
4. a vaccine causing the body to produce antigens against the infection
Answers: 1
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