IL2 and systemic lupus erythematosus: The SRI‐4 response rates of patients with SLE who received 1 million IU of LD‐IL‐2 every other day for 2 weeks, followed by a 2‐week break, and measured after 12 weeks were 73.2%, and the SELENA‐SLEDAI scores of these patients were significantly decreased compared with before medication.