We inform you about the latest infectious disease outbreaks from overseas. Read the new articles.

Information as of May 23, 2025

Outbreak of variant type 1 polio in Madagascar declared over|20 May 2025|African Region
Antananarivo – Madagascar has successfully halted the transmission of variant poliovirus type 1, following recommendations from a rigorous, independent Outbreak Response Assessment (OBRA) to declare the outbreak closed. This achievement marks a major milestone in the country’s ongoing efforts towards polio eradication.

Circulating vaccine-derived poliovirus type 2 (cVDPV2)|20 May 2025|Papua New Guinea
All isolates were classified as cVDPV2 and were genetically linked to the environmental sample detected on 4 April 2025. Genetic sequencing revealed 18-19 nucleotide differences from the Sabin 2 vaccine strain. All isolates are closely related to each other and genetically linked to the INO-PAP-2 emergence that previously caused an outbreak in Indonesia.

Yellow fever|16 May 2025|Region of the Americas
In 2024, human cases of yellow fever were reported mainly across the Amazon region of Bolivia, Brazil, Colombia, Guyana, and Peru. In 2025, however, cases have been detected mainly in areas outside the Amazon region, including in the state of São Paulo, Brazil and the Tolima department, Colombia. The 212 confirmed yellow fever cases reported so far in 2025 in the Americas represent a threefold increase compared to the 61 confirmed cases reported in 2024.