A 2-month-old girl born to an HIV-Infected mother presented with Cente
rs for Disease Control and Prevention (CDC)-defined acquired immune de
ficiency syndrome (AIDS): Pneumocystis carinii pneumonia with no other
cause for immunodeficiency. Extensive evaluation for over 2 years fai
led to identify active HIV infection. Children fulfilling CDC criteria
for ''AIDS'' may not be infected with HIV.