TOPSHOT - A nurse prepares a measles vaccine to a boy in the school of Lapaivka village near the western Ukrainian city of Lviv on February 21, 2019. - The mobile brigade, which consists of two pediatricians and a nurse, arrived to the Lapaivka village as part of the health ministry's special operation in this region, leading in terms of registered measles cases. A measles epidemic is still not declared in Ukraine, though in 2018 the country recorded highest number of measles cases in European region. Since the start of 2019, around 20,000 people in Ukraine have contracted this highly contagious viral disease. Nine people, including two children, have died of measles in Ukraine this year. (Photo by Yuri DYACHYSHYN / AFP)