According to him, COVID-19 vaccine candidates are of various categories based on their mechanism of action such as the inactivated or weakened virus vaccines.
He also said there were protein-based vaccines, which used harmless fragments of proteins or protein shells that mimic the COVID-19 virus to safely generate an immune response.
He added that the viral vector vaccines used a virus that had been genetically engineered so that it could not cause a disease but would produce coronavirus proteins to safely generate an immune response.
He added that the Ribonucleic Acid (RNA) and Deoxyribonucleic Acid (DNA) vaccines employed a cutting-edge approach that used genetically engineered RNA or DNA to generate a protein that safely prompted an immune response.
NAN reports that 1.09 million Nigerians have been administered the first dose of the Astrazeneca vaccine. (NAN)