CCL2 and tuberculosis: The analysis of the MCP-1–2518A/G polymorphism, qualified in 10 studies (Table 1), revealed that the MCP-1–2518A/G polymorphism increased the risk of tuberculosis in Chinese people (dominant model (GG+GA vs. AA OR = 1.53, 95 % CI 1.14‒2.07, p = 0.000), recessive model (GG vs. GA+AA OR = 1.63, 95 % CI 1.13‒2.35, p = 0.009), and homozygote comparison (GG vs. AA OR = 1.93, 95 % CI 1.19‒3.13, p = 0.008)) (Table 2, Fig. 2).