According to the CDC's 1993 guidelines, <ref>http://www.cdc.gov</ref><ref>http://www.merckmedicus.com/ppdocs/us/hcp/content/merck/hiv/hivaids/aidsdefi.htmAIDS is defined </ref>as follows:
According to the CDC's 1993 guidelines, <ref>http://www.cdc.gov</ref><ref>http://www.merckmedicus.com/ppdocs/us/hcp/content/merck/hiv/hivaids/aidsdefi.htmAIDS is defined </ref>as follows:
HIV infection ''plus'' any of the following:
HIV infection ''plus'' any of the following:
−
*CD4 count less than 200 or
+
*[[CD4]] count less than 200 or
*CD4 percentage less than 14% of total lymphocytes or
*CD4 percentage less than 14% of total lymphocytes or
*Any of the following illnesses: pulmonary TB, recurrent pneumonia, invasive cervical cancer.
*Any of the following illnesses: pulmonary TB, recurrent pneumonia, invasive cervical cancer.