Between 2000 and 2024, global measles mortality dropped by 88% — vaccinations helped save about 58 million lives. However, the virus is once again spreading rapidly in countries that were previously considered close to complete elimination, scientists warned in a new World Health Organization report, as cited by HealthDay.

Last year, large or health-system-disrupting measles outbreaks were recorded in 59 countries — nearly three times more than in 2021. The virus has even returned to places where it was thought to be defeated, including Canada and the United States.

“Measles remains the most contagious virus in the world,” said WHO Director-General Tedros Adhanom Ghebreyesus.

Despite the availability of an effective and inexpensive vaccine, he emphasized that the virus “exploits any gaps in immune protection.”

According to the organization’s estimates, more than 30 million children worldwide were insufficiently protected against measles in 2024. Only 84% received the first vaccine dose, and just 76% got the second one — which is critical for establishing about 95% immunity.

Nevertheless, some regions have made impressive progress. This year, Cabo Verde, the Seychelles, and Mauritius became the first African countries to eliminate measles.

WHO highlights several reasons for declining vaccination coverage: disruptions in immunization programs due to the pandemic, the spread of misinformation, and reduced funding. The organization warns that recent cuts to international health programs, including the measles and rubella laboratory network, could lead to even larger outbreaks in the coming years.