What is "antigens"

Usage examples of "antigens".

So this was a free clinic and they screwed up the test and I came up positive with surface antigens and hepatitis.

Squark, the Wabble Effect, the Antigens, his own Theory of Subsequence.

Therefore, down on cellular level, your white blood corpuscles and antigens are waging relentless, violent war on invaders.

However, the lab boys tell me all body fluids contain antigens that indicate the blood type for that person.

Valda laughed just behind him again, and she laughed harder when he tried to explain the work he had been doing on particlesdescribing the Squark, the Wabble Effect, the Antigens, his own Theory of Subsequence.