Vaccinate yourself with TB vaccine to lead a pain-free life: TB/BCG vaccine-based activation of the PD-1 pathway for Pain therapy: TB/BCG vaccine, a tuberculosis vaccine,  increases the expression of PD-L1, attenuates acute and chronic pain, and suppresses mechanical and thermal hypersensitivity and inhibits nociceptive neuron excitability, via up-regulation of its target gene, 25/July/2018, 11.20 pm