Research findings report that drinking black tea might improve the body's defenses and quicken the response to bacteria and viruses - giving people more reason to brew a hot cup of tea this winter.
1) Kamath AB, Wang L, Das H, Li L, Reinhold VN, Bukowski JF. Antigens in tea-beverage prime human Vgamma 2Vdelta 2 T cells in vitro and in vivo for memory and nonmemory antibacterial cytokine responses. Proc Natl Acad Sci U S A. 2003 May 13;100(10):6009-14. Epub 2003 Apr 28.
Additional Souirce: The Tea Council of the USA