The 20th immunisation drive against polio ended on Saturday with an estimated 22 million children aged under-5 vaccinated twice a month apart.
Director of primary health care Dr Sayed Abu Jafar Mohammad Musa told bdnews24.com that they were expecting hundred percent coverage of their target in the second round.
"Our field staff will make door-to-door visit in the next four days to feed the dropouts, if any," he said and added that they would be able to calculate their total coverage within four days.