Previous studies have revealed that peripheral Vδ1 T cells exert strong anti-infection and antitumor effects through binding to MHC class I chain-related gene A/B (MICA/B) or UL16-binding proteins (ULBPs), and these cells display a strong cytotoxic ability upon stimulation with PHA (polyhydroxyalkanoates) and IL-7 in vitro [14–18]. This evidence concerns the gene IL7 and infection.