MOHAMMED MUKHIER and MATSHIDISO MOETI Africa has reached a momentous milestone which underlines that the continent can overcome seemingly impossible health challenges such as COVID-19. Today (25 August) an independent body of experts has certified the World Health Organization (WHO) African Region as free of wild poliovirus. This is only the second virus in history to be eradicated from the continent since the eradication of smallpox 40 years ago. The achievement—which comes after years of collective effort and determined progress—provides crucial lessons to sustain immunization generally, and to help stop the spread of COVID-19. Our first lesson during the campaign…