At least 11 people, including five women and two youths, suffering from fever, cough, and breathing complications died in Bogura, Pabna, Rajshahi, Narsingdi, Sherpur, Joypurhat, Cumilla, Brahmanbaria, and Kurigram districts on Thursday, reports news media.
Of the 11, two recently returned home from Narayanganj.
In Kurigram, a deputy assistant engineer of Kurigram office of the Education Engineering Department (EED), died while suffering from fever, cold and respiratory problems.
He had been undergoing treatment at Rangpur Medical College Hospital (RMCH) and died while being taken to Dhaka around 9:30pm, said Shahjahan Ali, executive engineer, Kurigram EED.
In Pabna, a 50-year-old woman died with fever, breathing complications and sore throat in Santhia upazila in the afternoon.
Santhia Upazila Nirbahi Officer (UNO) SM Jamal Ahmed said the woman had been suffering from breathing complications for the last few days.
He said the residence of the deceased was put under lockdown.
Upazila health and family planning officer Fatema Tuz Jannat said they collected samples from the woman and sent for testing.
Civil surgeon Mohammad Ekramullah said her samples would be sent to Dhaka for test.
In Cumilla, an HSC examinee died with fever and cold at Nabinagar Upazila Health Complex in Brahmanbaria.
The deceased, Mohammad Raihan, 20, son of a certain Mokhlesur Rahman of Balighar village in Muradnagar upazila, had been suffering from fever, cold and breathing problems for the last few days.