MSF nurse Persa Dimitsaki vaccinates a child during an emergency measles vaccination campaign in Moria camp on the Greek island of Lesvos, where thousands of refugee men, women, and children live in squalid, overcrowded conditions without sufficient access to health care. "Moria camp is both unsafe and wholly unhealthy, especially for children," said Declan Barry, MSF medical coordinator. "Every day we treat many hygiene-related conditions such as vomiting and diarrhea, skin infections, and other infectious diseases, and we must then return these people to the same risky living conditions. It's an unbearable vicious circle." In May, MSF called on Greek authorities to transfer people from Lesvos to the Greek mainland and scale up provision of health care on the island.