Experts said there might be misconception among some people that Covid-19 vaccines provide immediate protection.
They also said that there was also no evidence that any of the current Covid-19 vaccines could completely stop people from being infected, advising people to continue to wear masks and maintain other health guidelines laid out by the World Health Organization.
Bangladesh has been administering the Oxford vaccine across the country among people aged 40 years and above. So far, around 21 lakh people have received their first dose.
The issue of how much and from when the vaccine will provide immunity surfaced after a vaccine recipient tested positive for Covid-19 seven days after receiving the first jab in Dhaka on February 10.