ALEIXIS AKWAGYIRAM NIGERIA hopes to receive up to 70 million doses of the Johnson & Johnson COVID-19 vaccine this year through the African Union (AU), its primary healthcare chief told Reuters, amid concerns about delayed deliveries of AstraZeneca shots. Rolling out vaccines in developing nations such as Nigeria, whose 200 million-strong population is Africa's biggest, is seen as key to stemming the global spread of the new coronavirus. Nigeria, which has recorded 2,049 deaths from COVID-19 and began vaccinations this month, plans to inoculate 40% of its people this year and another 30% in 2022. Last week, India - the…