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?
We vroegen welk percentage één-jaar-oude kinderen in de wereld gevaccineerd werden tegen mazelen en andere dingen waar we al jaren mee te maken hadden: 20, 50 of 80 percent?