CDC currently say 13 to 64
Seems like this was based on the USPSTF guidelines for screening people aged 15-65 (here: Recommendation: Human Immunodeficiency Virus (HIV) Infection: Screening | United States Preventive Services Taskforce)
They’re currently being updated, feel like we could keep this card as is for now unless we see a question explanation use the >13 cut-off
Keep as now but add extra field saying current USPSTF guidelines states screening 15-65 while CDC guidelines says 13-64 is appropriate?
We have a few other cards that mention numerous guidelines recommendations. My opinion is go with USPSTF in text but that’s just because i’m on FM rn 
My feeling is that USPSTF gets tested more often when it comes to guidelines but I may be wrong
USPSTF is very strong evidence for NBME, would leave as is