After reporting record cases that topped 4.5 million last year, countries in the Americas have already recorded more than 673,000 dengue infections in the first 5 weeks of 2024, including 700 severe cases and 102 deaths. Countries reporting increases this year are Argentina, Brazil, Colombia, Costa Rica, Guatemala, Guadeloupe, French Guiana, Martinique, Mexico, Paraguay, and Peru.

Two thirds of this year’s cases are from Brazil, where more than 455,000 dengue infections have been reported.

All four serotypes are circulating in the Americas region this year, with proportions that vary by country. However, Brazil, Costa Rica, Honduras, and Mexico are seeing circulating of all four serotypes.