The fresh cases were reported from Munger district.
Health Department's Principal Secretary Sanjay Kumar said new patients including the boy, two men and three women are residents of Sadar Bazar area of Jamalpur in Munger district.
"This is a result of contact-tracing," he said.
Jamalpur has reported more than a dozen cases in the past one week, most of which were traced to a 60-year-old vegetable seller who had travelled to Nalanda district last month to attend a Tablighi Jamaat congregation.
Munger has now 37 cases while Nalanda accounted for 31, making them the two worst affected in the state.
Six patients from Munger have recovered from thedisease and one has died, while Nalanda has 29 active cases.
Out of 38 districts in the state, 18 have reportedCOVID-19 cases. Siwan (30) and Patna (24) also account for double digit figures.
The total number of active cases in the state nowstands at 130.
Two persons died of the disease while 44 haverecovered.
The number of samples tested so far in the state is13,785
There has been a steep rise in the number of casessince Monday when the state's aggregate crossed the three-digit mark.
Taking a serious note of the spike in the number ofCOVID-19 cases, the state health department issued a circular making it mandatory for people to wear face masks while travelling and visiting public places like food, vegetable and medicine shops, and dairies.
Those failing to do so will be penalised as perprovisions of the Bihar Epidemics Diseases, COVID-19Regulations, it said. AR BDC DVDV