| Term 
 | Definition 
 | 
        |  | 
        
        | Term 
 | Definition 
 
        | HIV+, acquired immune deficiency syndrome, immune system failing |  | 
        |  | 
        
        | Term 
 | Definition 
 
        | anti-retroviral therapy, drug combination |  | 
        |  | 
        
        | Term 
 | Definition 
 
        | refers to a drug or ART (not previously on drugs), *some patients might be infected by someone on stable medication |  | 
        |  | 
        
        | Term 
 | Definition 
 
        | previously on ART (specific class or any ART) |  | 
        |  | 
        
        | Term 
 | Definition 
 
        | brief elevation in viral load, transient, return to normal in most PTs, happens to 1/4pts on ART, *usually not highly elevated |  | 
        |  | 
        
        | Term 
 | Definition 
 
        | change in initial therapy due to medication intolerance, medication failure or virologic failure, change regimen (usually more complex) |  | 
        |  | 
        
        | Term 
 | Definition 
 
        | highly drug-experienced patient, running out of options, medication "recycling" |  | 
        |  | 
        
        | Term 
 | Definition 
 
        | most common in US, subtypes: B is most prevalent in US, more virulent, relatively easily transmitted |  | 
        |  | 
        
        | Term 
 | Definition 
 | 
        |  | 
        
        | Term 
 | Definition 
 
        | genotype-nucleoside mutation, phenotype-morphological change, tropism-change from environmental stimuli |  | 
        |  | 
        
        | Term 
 | Definition 
 
        | relationship of virus to CD4+ co-receptor |  | 
        |  | 
        
        | Term 
 | Definition 
 
        | HIV-1: chimpansee subspecies, west equatorial Africa |  | 
        |  | 
        
        | Term 
 | Definition 
 
        | sooty mangabeys, Guinea-Bissau (west Aftrica) |  | 
        |  | 
        
        | Term 
 | Definition 
 
        | orchestrate communication among other cell types of the immune system |  | 
        |  | 
        
        | Term 
 
        | CD: “Clusters of Differentiation” |  | Definition 
 
        | Cell-surface markers (proteins) that allow for  categorization of T-cells (& other cell types) into specific lymphocyte subtypes, e.g., CD2+, CD3+, CD8+, etc. |  | 
        |  | 
        
        | Term 
 | Definition 
 
        | CD4 count < 200 or <14% total lymphocytes, infections (bacterial, fungal, protozoal, viral), malignancies (sarcoma, lymphoma) |  | 
        |  | 
        
        | Term 
 | Definition 
 
        | IV drugs, sex (unprotected), blood product transfusion, mother-to-baby, occupational exposure |  | 
        |  | 
        
        | Term 
 | Definition 
 
        | behavioral modification, safety devices, pre-exposure prophylaxis or PrEP, post-exposure prophylaxis |  | 
        |  |