According to Hou et al. [65], there was a decrease in the use of the TRBV1, TRBV5, TRBV6, TRBV19, TRBJ1-4, and TRBJ2-6 genes in COVID-19 patients, while there was an increase in the use of genes from the TRBV3, TRBV9, TRBV11, TRBV12, TRBV15, TRBV21, TRBV24, TRBV27, and TRBJ1-6 families. Here, TRBV9 is linked to COVID-19.