Authorities in the Democratic Republic of Congo say Measles has killed almost 5,000 people this year, after the disease spread to all the provinces in the country.
Close to 250,000 people have been infected this year.
The World Health Organization (WHO) said this is the world's largest and fastest-moving epidemic.
Measles in DR Congo has now killed more than twice the number who have died of Ebola there in the last 15 months.
The Congolese government and the WHO launched an emergency vaccination programme in September that aimed to inoculate more than 800,000 children.
However, poor infrastructure, attacks on health centres and a lack of access to routine healthcare have all hindered efforts to stop the spread of the disease.