We asked, what is the percentage of the world's one-year-old children who have got those basic vaccines against measles and other things that we have had for many years: 20, 50 or 80 percent?
Perguntamos qual era a porcentagem de crianças de um ano que tomaram as vacinas básicas contra sarampo e outras coisas que já existem há muitos anos: São 20, 50 ou 80%?