Among participants assigned to Visitect CD4 testing whose initial CD4 results were read as ≤200 cells/μl but confirmatory CD4 testing revealed CD4>200 cells/μl, the cumulative cost of opportunistic infection diagnostics, Tuberculosis (TB) prophylaxis, fungal prophylaxis, and other laboratory tests and procedures translated to an additional $12.63 per participant with true advanced HIV disease (Figure S2). The gene discussed is CD4; the disease is tuberculosis.