Examlex
To study adolescents' attitudes toward contraceptive use,a researcher recruits subjects from a waiting room of a community clinic that offers free contraceptive services to all.This researcher has a sample that is ____.
Congenital Heart Disease
Congenital heart disease includes heart defects present at birth, causing variations in the normal flow of blood through the heart.
Cataracts
A medical condition where the lens of the eye becomes progressively opaque, resulting in blurred vision and potentially leading to blindness if not treated.
Acquired Immunodeficiency Syndrome
A chronic, potentially life-threatening condition caused by the human immunodeficiency virus (HIV), which damages the immune system.
HIV-Positive
A status indicating that an individual has been infected with the Human Immunodeficiency Virus, which attacks the immune system.
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