Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
(CDC) Classification Laboratory Categories in 1993
| Category | CD4+ T‐lymphocyte count | Clinical category | ||
|---|---|---|---|---|
| A (asymptomatic) | B (symptomatic) | C (AIDS‐indicator conditions) | ||
| 1 | ≥500 cells/μL | A1 | B1 | C1 |
| 2 | 200–499 cells/μL | A2 | B2 | C2 |
| 3 | <200 cells/μL | A3 | B3 | C3 |
