(FILES) An undated handout picture released by the University of Oxford on November 23, 2020 shows a vial of the University’s COVID-19 candidate vaccine, known as AZD1222, co-invented by the University of Oxford and Vaccitech in partnership with pharmaceutical giant AstraZeneca. – Britain on December 30, 2020 became the first country in the world to approve the coronavirus vaccine developed by drug firm AstraZeneca and Oxford University, with a mass rollout planned from January 4, 2021. (Photo by John Cairns / University of Oxford / AFP) / The Presidential Tasks Force (PTF) on COVID-19 has insisted that the Oxford-AstraZeneca COVID-19 vaccine is safe for Nigerians despite the growing global concerns over possible side effects.