France and Italy continue to battle chikungunya outbreaks and the spread of dengue, as Greece probes possible local malaria cases.
In a chikungunya genotype shift, detection of ECSA in at least 4 countries is concerning, because cocirculation enhances the risk of adaptation.
Agency officials say their analysis indicates the benefits of the vaccine, which contains a weakened form of the chikungunya virus, do not outweigh the risks.
The CDC reported five more influenza-associated pediatric deaths, bringing the total for the 2024-25 flu season to 275.
Rising temperatures, longer summers, milder winters, and changing rainfall patterns are creating more favorable conditions for mosquito populations.
Officials have confirmed five Oropouche virus-related deaths this year, all in Brazil.
France has now reported 63 local chikungunya cases from 16 different administrative units.
The CDC's latest chikungunya travel advisory is for a hot spot in China's Guangdong province.
The WHO said B, C, and D subtypes cause 1.3 million deaths each year and that hepatitis D is now classified as carcinogenic to humans, alongside B and C.
WHO experts are seeing the same chikungunya warning signs that occurred two decades ago, when the virus swept across Indian Ocean countries.
