TRBV30 and infection: Meanwhile, we found some β-chain V-J pairs specifically expressed in infected PB and infected SP, which accounted for a greater proportion of the top 10 downregulated expression levels of the TRBV (TRBV17, TRBV15, TRBV30, TRBV12-1, TRBV14, and TRBV29) and TRBJ (TRBJ1-5, TRBJ1-3, TRBJ1-6, and TRBJ1-4) genes after infection (Fig. 5E).