Moderate as in Rh factor A substance present in the blood, serum, or tissues that stimulates the immune system to produce antibodies. Clear All
2 Example Sentences Showcasing the Meaning of 'Antigen'
The doctor explained how the antigen in the flu vaccine helps our bodies build immunity to the virus.
The veterinarian explained that dogs, like humans, can have antigens that help protect them from certain diseases.
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