The deceased were identified as Shilpi Khatun, 28, and Shaon, 3, son of Juwel Pramanik of Daulatpur upazila.
Residential Doctor of Kushtia General Hospital Tapos Kumar Sarkar said Shilpi was suffering from fever and cold.
Her samples were collected for coronavirus test after she died at 7:30pm.
Besides, Shaon suffering with fever and vomiting was taken to Daulatpur Hospital and was referred to Kushtia Hospital.
Also read: Bangladesh confirms four more coronavirus deaths, 219 new cases
His samples were collected for COVID-19 test after he died on the way to Kushtia Hospital, said Daulatpur Assistant Commissioner (land) Executive Magistrate Md Azgar Ali.
Meanwhile, Bangladesh reported 219 new coronavirus cases and four more deaths on Wednesday, taking the number of fatalities in the country to 50. So far, 1,231 coronavirus cases have been recorded in the country.