(DAKAR, Senegal) — More than 4,000 people have died in Congo this year in the world’s largest measles outbreak, the United Nations children’s agency said Wednesday.

The Central African nation is also battling an Ebola outbreak that has killed about half that number since August 2018.

Since January, more than 200,000 cases of measles have been reported across Congo, UNICEF said. More than 140,000 involve children under 5, who also make up nearly 90 percent of deaths.

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