By Hugo Francisco de Souza Reviewed by Lauren Hardaker Jun 13 2025 As Oropouche virus outbreaks sweep Brazil, Cuba, and beyond, a major WHO report warns that this overlooked tropical disease could be the next global health emergency. Study:  Risk evaluation of Oropouche virus and its reassortants . Image credit: CI Photos/Shutterstock.com World Health Organization researchers reviewed current information on the Oropouche virus (OROV), its recent outbreaks, and potential global health impacts in