As the nutritional status of TB patients is very critical in the assessment of their disease progression or improvement, only the BMI of the patients was included in our evaluation indexes, and most of the patients were not included due to the lack of information on serum albumin, hemoglobin, micronutrients such as vitamin D, iron, and zinc, and the MUST (Malnutrition Universal Screening Tool) scores, and more evaluation indexes of the nutritional status will be collected and analyzed in the future. The gene discussed is ALB; the disease is nutritional deficiency disease.