Examlex
Which of the following sexual behaviours do not occur in anyone over the age of 75?
Rh-Positive
Refers to the presence of the Rh antigen on the surface of red blood cells, a significant factor in blood transfusion compatibility.
Rh-Negative
Refers to the absence of the Rh factor, a protein on the surface of red blood cells, significant in blood transfusion and pregnancy compatibility situations.
Rubella
A contagious viral disease characterized by a distinctive red rash, usually mild in children but can cause serious congenital defects if contracted by pregnant women.
Birth Defects
Physical or biochemical abnormalities present from birth, which can result in mental or physical disabilities.
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