CHIJIOKE OHUOCHA NIGERIA expects to receive nearly 8 million additional doses of COVID-19 vaccines by the end of August, including from a U.S. government donation, the head of its primary care agency said on Tuesday. Faisal Shuaib, head of the National Primary Health Care Development Agency (NPHCDA), said Nigeria exhausted its initial supply of nearly 4 million shots last week and aims to resume vaccinations within weeks, when the new doses arrive. Nigeria expects delivery of 3.924 million doses of Oxford/AstraZeneca shots from global vaccine-sharing scheme COVAX by the end of July or early August, Shuaib said, and an additional…