For urgently treating the soaring number of severe patients, the Chinese Diagnosis and Treatment Protocol for 2019 Novel Coronavirus Pneumonia (The 7th Trial Edition) has updated a guideline for taking immunotherapy: for patients with extensive lung lesions and severe cases who also show an increased level of IL-6 in laboratory testing, Tocilizumab can be used for treatment. Here, IL6 is linked to susceptibility to pneumonia measurement.