WHO Warns of Yellow Fever Resurgence in Africa, Americas

The World Health Organization (WHO) has issued warnings regarding the resurgence of yellow fever outbreaks across Africa and the Americas, attributed to low vaccination coverage and climate change, which expands mosquito habitats. In January 2026, transmission remained active, following a significant resurgence in the Americas in late 2024.

Six countries in the Americas reported 79 confirmed cases, while three African countries recorded 16 confirmed infections, with additional suspected cases under investigation. Health authorities have detected multiple outbreaks among non-human primates, indicating ongoing viral circulation.

The disease, endemic in tropical regions of Africa and South America, can cause severe symptoms such as jaundice, internal bleeding, and organ failure, with fatality rates reaching 50% among unvaccinated populations. The average vaccination coverage in high-risk African countries is estimated at just 65% as of 2024, below the 80% threshold necessary for strong population protection.

The WHO urges countries to enhance disease surveillance, laboratory testing, and vaccination programs, with a campaign to vaccinate 35 million people starting in 2025.