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2026年1月13日時点の情報
WHO Rapid Risk Assessment – Chikungunya virus disease, Global v.1|29 Dec 2025 |Pan American Health Organization
This Rapid Risk Assessment (RRA) aims to assess the risk of chikungunya virus disease at the global level, considering the public health impact, the risk of geographical spread and the risk of insufficient control capacities with available resources. The outcomes of the WHO RRA published on this page are intended to promote transparency in the spirit of IHR provisions; to provide a resource to national authorities facing similar or comparable situations; and to foster a shared risk assessment culture among States Parties, as well as regional and global entities contributing to preparedness for and response to health emergencies. The information presented on this page is shared in accordance with Article 11 of the IHR (2005).
Middle East respiratory syndrome coronavirus|24 December 2025|Global update
This disease outbreak news report focuses on the recent nine cases of MERS-CoV infection reported between 4 June – 21 December 2025: seven cases from the KSA and the two imported cases to France. The details of cases reported earlier in 2025 can be referred to in the previously published disease outbreak news on 13 March 2025 and 12 May 2025.
Epidemiological Alert Simultaneous circulation of seasonal influenza and respiratory syncytial virus – 9 January 2026|9 Jan 2026 |Pan American Health Organization
On 4 December 2025, the Pan American Health Organization/World Health Organization (PAHO/WHO) issued an alert regarding the possibility of early or more intense activity of respiratory viruses during the 2025-26 season, as compared to previous years. In this context, and based on the behavior observed to date, PAHO/WHO recommends that Member States remain vigilant in order to adjust their health service preparedness and organizational plans in anticipation of possible concurrent outbreaks of seasonal influenza and respiratory syncytial virus, which could overload their health care system.