In<unk> + patient presenting to ED, absolute lymphocyte count (ALC) can be used as surrogate for CD4 count 
A CD4 count of <200 is very likely if the ED ALC is <950 and less likely if the ALC is >1700
ALC is useful to confirm, but not exclude a low CD4
Approximately 1.2 million people in the US are living with<unk>  
13% of people with<unk>  in US aren't aware 
Most affected: homosexual & bisexual men, particularly African American 
A CD4 count of <200 is very likely if the ED ALC is <950 and less likely if the ALC is >1700
ALC is useful to confirm, but not exclude a low CD4
13% of people with<unk>  in US aren't aware 
Most affected: homosexual & bisexual men, particularly African American
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