CD19 and lymphopenia: Immune evaluations were performed on 22 children: 10/22 (45%) had CD19 lymphopenia, 6/22 (27%) had CD3 lymphopenia, 10/22 (45%) had CD4 lymphopenia, 2/22 (9%) had CD8 lymphopenia, 8/22 had a CD4/CD8 ratio < 1, 4/22 (18%) had NK lymphopenia, 7/21 had hypogammaglobulinemia, and 7/21 had hypergammaglobulinemia.