A three-year effort to immunise children who missed routine vaccinations due to the Covid-19 crisis is on course to reach the 21 million target, the United Nations has said.
The UN's World Health Organization and children's agency Unicef, along with the Gavi Vaccine Alliance, had launched "The Big Catch-Up" during the World Immunisation Week in 2023 as a response to the 2020 pandemic, which disrupted vaccination campaigns.