Chattogram Civil Surgeon Dr Sheikh Fazle Rabbi has tested Covid-19 positive.
Rabbi received the vaccine on February 7, but necessary antibody against the Covid-19 did not develop in his body yet, said Dr Abdur Rob, senior consultant of medicine and head of Covid-19 ward at Chattogram General Hospital, while speaking to The Daily Star.
"I have carried out antibody test on him for research purpose and found no antibody against Covid-19. It takes time to develop antibodies after receiving vaccines; a minimum of two weeks is required after the second dose of vaccine to develop antibodies, Dr Abdur Rob said.
"Moreover, I suspect, some new strains of mutated Covid-19, which is more contagious, is responsible for the present sharp rise of positive cases," the doctor said.
"So, there is no alternative to follow health rules until the pandemic is fully controlled," he observed.
A total of 212 positive cases have been recorded in Chattogram after carrying out tests on 1,859 samples in the last 24 hours till 10:00 pm yesterday (Monday).