Mississippi has recorded 115 pertussis cases this year, sharply higher than in 2024.
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.
