Progression to AIDS is diagnosed when a patient exhibits characteristic opportunistic infections combined with a CD4 T-cell count of 200 or less. ... Consequently, many variants of HIV develop in an individual (known as antigenic variation), some of which may escape immune attack by antibodies or killer T cells. Due to antigenic variation, antibodies formed against HIV are not protective and an infective state can persist despite the presence of even high antibody titers. ...

• Word Count: 1861
• Approx Pages: 7
• Has Bibliography
• Grade Level: Undergraduate

Homosexuality Homosexuality- The Major Cause of Homosexuality The origins of human sexuality and homosexuality in particular have puzzled philosophers, theologians and ordinary people for thousands of years. In scatter cultures, homosexuals have been regarded as a normal part of life, howev...

• Word Count: 2136
• Approx Pages: 9
• Has Bibliography
• Grade Level: High School

Homosexuality- The Major Cause of Homosexuality The origins of human sexuality and homosexuality in particular have puzzled philosophers, theologians and ordinary people for thousands of years. In scatter cultures, homosexuals have been regarded as a normal part of life, however, same sex attraction...

• Word Count: 2425
• Approx Pages: 10
• Has Bibliography
• Grade Level: Undergraduate