At total of 15 children have died in South Sudan after being given contaminated measles vaccines.
Of the 10 countries with the most unvaccinated children, 5 are African: DR Congo, Ethiopia, Nigeria, South Africa and Uganda
Since 2000, deaths from measles in Africa have fallen sharply, by 92% from 395,000 to just 28,000 in 2008, according to latest WHO data.
Vaccination in Africa: Angola, Mozambique biggest gainers; Zambia and Kenya see 'mysterious' decline
Africa is closing the gap on immunisations, but some countries are falling behind - and it is not the usual laggards.
Most people, suspicious of western healthcare and the state, believe the government is trying to bring Ebola back through measles vaccination!