“…In addition, the proportion of lymphocytes decreased in 9 of the elderly patients, which was much higher than that of the young and middle-aged patients. It may be due to changes in the elderly's lung anatomy and muscle atrophy leading to changes in the physiological functions of the respiratory system, reduced airway clearance, 7 reduced lung reserve, 8 and reduced defense barrier function, 9 The level of C-reactive protein in elderly patients is significantly higher than that in the young and middle-aged group, which is similar to MERS-CoV. 10 In terms of imaging, the incidence of multilobe lesions in elderly patients is significantly higher than in young and middle-aged patients.…”