Tocilizumab for treating severe COVID-19 pneumonia refractory to combined hydroxychloroquine, lopinavir plus ritonavir, and favipiravir: A case series

Three patients diagnosed with severe COVID-19 pneumonia received treatment with hydroxychloroquine combined with lopinavir, ritonavir, and favipiravir Two patients diagnosed early, received tocilizumab when the pneumonia became severe and survived The thrid patient was diagnosed late and received tocilizumab when the disease progressed to acute respiratory distress syndrome, and died