<unk>  refers to the presence or absence of water-soluble ABO blood group antigens in a person's bodily fluids, such as saliva, tears, breast milk, urine, and semen. People who secrete these antigens in their bodily fluids are referred to as<unk> s, while people who do not are termed non-secretors.<unk>  is controlled by the FUT2 gene (also called the Se gene), and the<unk>  phenotype is inherited in an autosomal dominant manner, being expressed by individuals who have at least one functioning copy of the gene. The non-secretor phenotype (se) is a recessive trait. Approximately 80% of Caucasian people are<unk> s, while 20% are non-secretors. Non-secretors have reduced susceptibility to the most common strains of norovirus. Expression of the antigens in the Lewis blood group is also affected by<unk> : non-secretors cannot produce the Le(b) antigen.
Secretor status
Blood type
History of pathology
SAMPLE history
Indian blood group system
Junior blood group system
Hh blood group
Lan blood group system