CD3, CD4, CD8, CD16, CD56, CD19, CD20/22, CD45RO, CD11a, CD11b, CD11c, CD18, NBT, DHR, C3, C4, CH50, SGOT, SGPT, ALP, BUN, Cr, TSH, T4, FT4, sweat chloride test, genetic study for CF, Saccharin blue test, electron microscopy for immotile cilia, HIV1 Ab, HIV2 Ab, HIV RNA PCR, WBC, absolute PMN, absolute lymph, absolute Eo, absolute MONO, MPV, HCT, MCV MCH, Plt ESR, IgG, IgA, IgM, IgE, IgG1, IgG2, IgG3, IgG4, anti diphtheria Ab, anti tetanus Ab, anti pneumococcal Ab, mitogen in LTT, antigen in LTT, allogenic cell in LTT. The gene discussed is CD4; the disease is diphtheria.