9.4 Million May Have Caught a Hidden Virus — Most Cases Were Missed

Oropouche virus was long treated as a largely Amazonian infection responsible for scattered outbreaks. New research suggests its real footprint across Latin America and the Caribbean is far larger than official counts showed.

Researchers estimate that more than 9.4 million infections occurred between 1960 and 2025. The figure is modelled rather than a count of confirmed patients, but it exposes how easily a dengue-like illness can circulate unnoticed.