antigenemia
noun
an·ti·gen·emia
variants:
or chiefly British antigenaemia \ ˌant-i-jə-ˈnē-mē-ə 
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Medical Definition of antigenemia
: the condition of having an antigen present in the blood
Persistent hepatitis antigenemia has been found to be a problem in the Southeast Asian population.— Michele Barry et al., The Journal of the American Medical Association, 17 June 1984