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Yellow fever virus resurgence in Sao Paulo State, Brazil, 2024-2025

Cunha, M. S.; Guerra, J. M.; Siconelli, M. J. L.; Fonseca, B. A. L.; Dias, J. C. A.; Freitas, G. D.; Sabino, E.; Manulli, E.; Pereira, G. M.; Valenca, I.; Matsumoto, P. S. S.; Faria, N. R.; Azevedo, N. F. C. C.

2025-03-17 infectious diseases
10.1101/2025.03.14.25323956 medRxiv
Show abstract

Yellow fever virus (YFV) was detected in two distinct geographic locations in Sao Paulo State, Brazil, between September 2024 and February 2025. Phylogenetic analysis of six new genomes revealed a re-introduction in 2022 from Midwest Brazil followed by persistence in Sao Paulo state. Continued surveillance in neotropical primates is required to prevent cases in humans.

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