pinavir and ritonavir plus oseltamivir in mild COVID19 Lopipinavir 10 mg/kg and ritonavir 2.5 mg/kg plus oseltamivir 4–6 mg/kg In mild COVID19 Experimental: lopinavir and ritonavir oseltamivir moderate to severe COVID19 Lopipinavir 10 mg/kg and ritonavir 2.5 mg/kg