Nigeria once accounted for more than half of the polio cases around the world but today, after a successful vaccination programme, the country is polio-free. Now up against COVID-19 and aiming to vaccinate 40 per cent of the population by the end of 2021, we can look to our experience with polio for lessons.

According to the largest clinical trial registry in the world, out of 3,500 COVID-19 clinical trials, only five are ongoing in Nigeria.