Furthermore, the XJ strain infection group specifically expressed IGHV8-12-IGHJ1, IGHV12-3-IGHJ4 and IGHV1S134-IGHJ4 genes, while the Bartha-K61 strain infection group specifically expressed IGHV1-12-IGHJ1, IGHV1-22-IGHJ1, IGHV1-50-IGHJ2 and IGHV1-30-IGHJ3. This evidence concerns the gene IGHV1-2 and infection.