IL-6 levels rise sharply after the occurrence of mycoplasma pneumonia, contributing to inducing T cell differentiation, promoting the release of inflammatory cytokines, and aggravating the disease.16 25-(OH)D is an important indicator of vitamin D metabolism in the body, and its deficiency is believed to be associated with a variety of immune diseases, such as type-I diabetes, asthma, severe pneumonia. The gene discussed is IL6; the disease is susceptibility to pneumonia measurement.