antigens
Pronunciation
Noun
B2 Upper-intermediate
Quick answer
Substances that the immune system recognizes as foreign and responds to by producing antibodies.
Test yourself
Which word fits the gap? "Vaccines work by exposing the body to _____ so it learns to fight off the real infection later."
Answer: antigens
In your own words, what does "antigens" mean?
Substances that the immune system recognizes as foreign and responds to by producing antibodies.
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