Bidemi Aye receives a pre-paid debt card for cash and food provided by World Food Programme (WFP) in a makeshift home in the Makoko riverine slum settlement in Lagos, Nigeria on November 27, 2020. Pius Utomi Ekpei/AFP via Getty Images The world was on "on the brink of catastrophic moral failure,' over vaccine distribution, the head of the World Health Organization said Monday. Dr.