All the three deceased persons were patients who were undergoing treatment at the Diphu Medical College and Hospital.
Currently, the health conditions of three out of 22 patients who are currently being admitted at the hospital are critical.
According to reports, a state medical expert team has been lodged at the hospital. Authorities are taking all measures to prevent the further spread of the viral disease.
Regular fogging is also being conducted in Diphu as a preventive measure.