Although these epidemiological statistics on AIDS in the United States provide a descriptive overview of the prevalence and patterns of HIV exposure in adolescents, the extent of asymptomatic HIV infection remains largely unknown.
Up to 80 percent of female adults and adolescents with inclusion conjunctivitis are asymptomatic, and almost half of those with adult inclusion conjunctivitis do not have a systemic infection of chlamydia.
Rates of chlamydia reported by gender indicate that women, overall, have higher rates than men due in large part to increased efforts in screening women for asymptomatic chlamydial infections.
Another study, of 42 perinatally HIV-infected children who survived beyond nine years of age, found about one-quarter of the children to be asymptomatic with relatively intact immune systems.
In asymptomatic children with COA, the descending aorta receives left ventricle blood through the ascending aorta; these children have fewer, if any, associated cardiac abnormalities.