Nigeria, March 7 -- About 15 months since the COVID-19 pandemic broke out in Wuhan, China, 117 million people have been infected and over 2.5 million deaths recorded globally.

Scientists have successfully developed effective vaccines against the virus and some countries have commenced COVID-19 vaccination campaign.

Nigeria on Friday commenced the vaccination of its citizens having received about four million doses of the COVID-19 Oxford-AstraZeneca vaccines.

The vaccination campaign began with healthcare workers who are often at the risk of exposure to infections being the first responders to patients.

President Muhammadu Buhari and Vice President Yemi Osinbajo received jabs of the COVID-19 vaccines on Saturday to drive vaccine accept...