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The U.S. Centers for Disease Control and Prevention (CDC)
classify HIV infection into 3 stages:1
The World Health Organization (WHO) classifies HIV infection into 4 stages:1
In general, the higher the CD4+ count, the less likely it
opportunistic diseases will occur. Most people who
have untreated HIV experience a gradual drop in the number of CD4+ cells. Each
person responds uniquely to this decline.
CitationsSchneider E, et al. (2008). Revised surveillance case
definitions for HIV infection among adults, adolescents, and children aged <
18 months and for HIV infection and AIDS among children aged 18 months to <
13 years—United States, 2008. MMWR, 57(RR-10): 1–12.
Also available online: http://www.cdc.gov/mmwr/PDF/rr/rr5710.pdf.
April 5, 2012
E. Gregory Thompson, MD - Internal Medicine & Peter Shalit, MD, PhD - Internal Medicine
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