AFTER civil war forced Samuel Dhol Ayeun to flee South Sudan as a teenager to neighbouring Uganda in 2013, memories of watching friends die of preventable diseases due to inadequate medical care inspired his goal of becoming a doctor. Now 27, Ayeun has graduated from medical school and is busy attending to COVID-19 and other patients at the prestigious Mulago National Referral Hospital in the Ugandan capital Kampala. "I made it," he told Reuters this week during his shift. "Being a refugee, it's not a punishment," he said. "It is an opportunity to continue with your dreams outside your country."…