The deceased was identified as Rajib, a worker of a restaurant in Dhaka.
Dr Kamnasish Majumdar, resident medical officer of Ramgati Upazila Health Complex, said the boy came to his home recently from Dhaka. He had been suffering from fever and cold for the last two days, said Dr Majumdar.
He died at his home early Monday, he said.
On information, the authorities concerned of Ramgati Upazila Health Complex collected samples form the deceased and ten of his family members and sent those to lab for testing.
Mohammad Solaiman, officer-in-charge of Ramgati Police Station, said the family of the deceased were sent to home quarantine.
Besides, local administration has sent 20 people, including three physicians and nurses of general ward of Sadar hospital, to home quarantine as a man tested positive for Covid-19 at the ward, said Civil Surgeon Dr Abdul Gaffar.