BRUSSELS—The European Union’s top official said Wednesday that ramping up COVID-19 vaccinations in low-income nations around the world was the No. 1 priority right now and committed another 200 million vaccine doses to Africa. European Commission President Ursula von der Leyen used a State of the European Union speech on Wednesday to announce the new donation to be fully delivered by the middle of next year and comes on top of 250 million already pledged. Even when rich nations are already contemplating giving a third, booster shot to large swathes of their populations, just about everyone in the globe’s poorer nations is still waiting to be fully vaccinated, laying bare an acute sense of inequality. “Our first and most urgent priority is to speed up global vaccination,” von der Leyen told European parliamentarians in a plenary left nearly empty because of continued virus regulations. Von der Leyen called it an …