https://travelhealthpro.org.uk/TravelHealthPro is the website comprising the travel health resources of the National Travel Health Network and Centre (NaTHNaC).https://worldhealthorg.shinyapps.io/mpx_global/#key-figuresAs of 25 May 2026, three cases of clade Ib mpox have been reported in Colombia. Previous cases reported in Colombia have reported travel history to Spain and Belgium. Please see our Topics in Brief article for further information on mpox.https://worldhealthorg.shinyapps.io/mpx_global/#key-figuresAs of 25 May 2026, five cases of clade Ib mpox have been reported in Slovakia. These are the first reports of confirmed clade I mpox in Slovakia. On 13 April 2026, a case of clade I mpox in Poland was reported with travel history to Slovakia. Please see our Topics in Brief article for further information on mpox.https://id-info.jihs.go.jp/surveillance/idwr/diseases/measles/graph/2026/meas26-20.pdfAs of 20 May 2026, a total of 498 measles cases have been reported in Japan for 2026. Please see our Topics in Brief article for further details on measles.https://www.cdc.gov.au/resources/publications/diphtheria-australia-epidemiological-update-18-may-2026On 18 May 2026, the Australia Centre for Disease Control reported an increase in the number of diphtheria cases across Australia, with a total of 221 confirmed cases reported in 2026. The majority of cases have been reported in the Northern Territory (133 cases) and Western Australia (79 cases). Please see our Topics in Brief article for further details on diphtheria.https://x.com/DrTedros/status/2058128899461038213?s=20On 23 May 2026, the World Health Organization (WHO) reported three additional cases of Ebola disease (EBOD) caused by the Bundibugyo virus. This brings the total number reported in Uganda to five, with a health worker amongst those affected. Please see our Topics in Brief article for further details on Ebola disease.https://www.charite.de/en/service/press_reports/artikel/detail/charite_stellungnahme_zum_gesundheitszustand_des_an_ebola_erkrankten_patientenOn 22 May 2026, the Charite University Hospital in Berlin reported that a US citizen medically evacuated from the Democratic Republic of the Congo with Ebola disease, has tested positive for Bundibugyo virus. Please see our Topics in Brief article for further details on Ebola disease.https://govmu.org/EN/Pages/NewsDetails.aspx?n=Minister-Bachoo-calls-for-urgent-and-reinforced-action-against-Chikungunya-and-Leptospirosis.aspxOn 2 April 2026, the Ministry of Health and Wellbeing reported a significant increase in chikungunya cases. At the time, 105 active cases were reported, particularly in the regions of Rose-Hill, Quatre-Bornes, and Roches Brunes. On May 14, 2026 the US CDC issued a Travel Alert regarding an increased risk of chikungunya to travellers visiting Mauritius. Please see our Topics in Brief article for further details on chikungunya.https://www.cdc.gov.tw/Bulletin/Detail/LQD50YJwZzsM53SLFyd1rg?typeid=9On 19 May 2026, Taiwan reported the first imported case of clade Ib mpox. The case had visited Thailand and reported unsafe sexual activity. Please see our Topics in Brief for further details on mpox.https://territorystories.nt.gov.au/10070/1036919/0On 19 May 2026, local health authorities in the Northern Territory reported two deaths from Murray Valley encephalitis. Both cases were reported from Alice Springs, one in April and the other in May 2026. Travellers should avoid mosquito bites.https://www.gov.uk/government/publications/mers-cov-risk-assessment/phe-risk-assessment-of-mers-covBetween January 2025 and 29 April 2026, there have been 19 human cases of MERS reported – 17 reported by the Kingdom of Saudi Arabia, and two reported by France in December 2025 in individuals who had travelled to the Middle East. Please see our Topics in Brief article for further details on MERS-CoV.https://agenciabrasil.ebc.com.br/saude/noticia/2026-05/estado-de-sp-confirma-mais-duas-mortes-por-febre-amarelaOn 14 May 2026, two deaths from yellow fever were reported in the Vale de Paraiba region of Sao Paolo state. This brings the total number of cases in the state during 2026 to nine, including five deaths. Please see our Topics in Brief article for further details on yellow fever.https://www.who.int/news/item/17-05-2026-epidemic-of-ebola-disease-in-the-democratic-republic-of-the-congo-and-uganda-determined-a-public-health-emergency-of-international-concernThe Director-General of the World Health Organization (WHO), has declared that the Ebola disease caused by Bundibugyo virus in the Democratic Republic of the Congo and Uganda constitutes a public health emergency of international concern (PHEIC). As of 16 May 2026, eight laboratory-confirmed cases, 246 suspected cases and 80 suspected deaths have been reported in Ituri Province of the Democratic Republic of the Congo across at least three health zones, including Bunia, Rwampara and Mongbwalu. Please see our Topics in Brief article for further details on Ebola disease.https://www.paho.org/en/documents/situation-report-2-measles-americas-regionAs of 7 May 2026, a total of 5,399 cases of measles have been reported in 2026. Please see our Topics in Brief article for further details on measles.https://www.paho.org/en/documents/situation-report-2-measles-americas-regionAs of 7 May 2026, a total of 10,049 cases of measles have been reported in 2026. Please see our Topics in Brief article for further details on measles.https://reliefweb.int/report/tonga/tonga-dengue-fever-outbreak-situation-report-16-5th-may-2026As of 5 May 2026, a total of 56 confirmed dengue cases have now been reported in Tonga. The highest number of cases have been reported from Tongatapu Island. Dengue virus serotype 2 (DENV-2) has been confirmed. Please see our Topics in Brief article for further details on dengue.https://x.com/WHO/status/2051952287245897925As of 6 May 2026, a total of eight hantavirus cases (three confirmed) associated with a cruise ship have now been reported by the World Health Organization. The type of virus in this outbreak has been confirmed as Andes hantavirus. Risk to the global population is low.https://mpox-monthly.ecdc.europa.eu/Between April 2025 and March 2026, one clade I mpox case was reported in Luxembourg. This is the first clade I mpox case reported in Luxembourg. Please see our Topics in Brief article for further details on mpox.https://www.cdc.gov.au/newsroom/news-and-articles/surveillance-works-finding-poliovirus-it-finds-usOn 1 May 2026, an environmental detection of circulating vaccine-derived poliovirus type 2 (cVDPV2) from a wastewater sample was reported in Perth, Western Australia. Please see our Topics in Brief article for further details on polio.https://www.ssi.dk/aktuelt/nyheder/2026/foerste-tilfaelde-af-lokal-smitte-med-mpox-variant-paavist-i-danmarkOn 27 April 2026, the number of confirmed clade Ib mpox cases in Denmark has increased to four. One case has reported no travel history abroad, indicating locally acquired infection. Please see our Topics in Brief article for further details on mpox.https://worldhealthorg.shinyapps.io/mpx_global/#sec-cladesOn 13 April 2026, the first detection of clade I mpox in Poland was confirmed. The clade subtype is unspecified. The case is an adult male who had a travel history to Slovakia. No onward transmission associated with this case has been reported. Please see our Topics in Brief article for further details on mpox.