CD4 and diabetes mellitus: Using 6 influenza-reactive αβTCRs, 3 CD4 sequences, and 3 CD8 sequences, with known specificities to hemagglutinin or the matrix protein of the virus and restricted to diabetes-risk HLA molecules (16–18), we searched all 4 time points for the presence of the influenza TCR-β chains (identical V, J, and CDR3 amino acid sequences).