According to WHO, in week 23, 2026 (1st June to 7th June): 17 out of 26 countries of the enhanced meningitis surveillance network shared their meningitis epidemiological data. Epidemics (incidence ≥ 10/100’000 inhabitants):D.R. Congo: Tshopo, Equateur, Bas-Uele, and Sud-UbangiEthiopia: Oromia, Sidama, and SNNPNiger: Agadez Alerts (incidence ≥ 3 and <10/100’000 inhabitants):Benin: Atacora, Borgou, and Zou regionCentral African Rep.: Region 6 and 7D.R. Congo: Nord-Ubangi, Tshopo, Tshuapa, Sud-Kivu, Equateur, Maniema, Sankuru, Nord-Kivu, Ituri, Kwilu, Sub-Ubangi, and Kongo centralEthiopia: SNNPR, Oromia, Somali, Sidama, SNNP, Amhara, and Addis AbabaGhana: Upper WestGuinea: ConakryMali: BamakoNiger: Agadez and NiameySenegal: DakarTchad: Ouaddai For previous epidemics and alerts, see news at www.healthytravel.ch.    

Guatemala: Since the outbreak began in January 2026, Guatemala has reported 16,840 measles cases (6,903 laboratory-confirmed) and 22 deaths, up from 10 deaths in mid-May. Most fatalities occurred in young children, including three infants too young to be vaccinated.  Guatemala Department accounts for nearly half of confirmed cases, with Guatemala City reporting over 2,100 infections. Weekly cases peaked in March and have since declined substantially.  The outbreak was linked to a large international religious gathering in December 2025. More than 1.1 million vaccine doses have been administered, and mass vaccination campaigns are being expanded to affected departments.  Honduras: As of 12 June 2026, Honduras has confirmed five measles cases: four imported from Guatemala and one locally acquired case in an unvaccinated 25-year-old woman on Roatán, marking the country's first autochthonous measles case since elimination in 1997.  In response, health authorities have launched contact tracing, expanded vaccination campaigns, mandated mask use in health facilities, and extended the national immunization campaign through 30 June. Vaccination coverage remains below the 95% target.

As of 13 June 2026, Malaysia reported 33'367 dengue cases, a 27% increase compared with the same period in 2025. The highest burden was recorded in Selangor (15'422 cases), followed by Kuala Lumpur/Putrajaya (6'107) and Johor (3'556). Sabah experienced the sharpest rise, with cases increasing by 50% to 2'866. Twenty-three deaths were reported, up from 17 during the same period last year.  Health authorities attribute the increase to the expected cyclical dengue pattern and the emergence of DENV-3 as the dominant serotype. In response, the Ministry of Health has strengthened prevention efforts through its Dengue-Free Community (Kombat) program.

EU/EEA and outermost territories In April 2026, 29 EU/EEA countries reported measles data: 17 countries reported 451 cases and 12 reported none. The highest numbers were reported in Bulgaria (163), Italy (133), Latvia (38), France (32), and Spain (23).  Between 1 May 2025 and 30 April 2026, 30 EU/EEA countries reported 3’779 measles cases, of which 84% were laboratory confirmed. Children under five years accounted for 34% of cases, while adults aged ≥15 years represented 44%. The highest notification rates were observed among infants under one year and children aged 1–4 years.  Among cases with known vaccination status, 78% were unvaccinated, 12% had received one dose, and 9% had received two or more doses of a measles-containing vaccine. Three measles-related deaths were reported during the period, including two in France and one in the Netherlands.  Outbreaks continue in Bulgaria, while sporadic cases and clusters have been reported across several other EU/EEA countries.  Europe outside EU/EEA Ukraine: Since the beginning of the year and as of April 2026, there has been 201 cases. UK: Between 1 January and 8 June 2026, England reported 736 laboratory-confirmed measles cases, including 106 cases in the previous two weeks, compared with 959 cases during all of 2025. Two measles-related deaths in children were confirmed, the first such deaths in England and Wales since 2018. Children aged ≤10 years accounted for 61% of cases, while London reported over half of all infections (404 cases). Despite ongoing transmission, MMR coverage remains below the 95% target, with first-dose coverage at 91.8% and second-dose coverage at 83.9% nationally.

Between January and mid-April 2026, Zimbabwe reported 65’399 malaria cases and 174 deaths, nearly double the number of cases reported during the same period in 2025 (around 36'000) and almost four times the 2024 total (around 17’000). The outbreak has affected multiple districts across Manicaland, Mashonaland Central, Mashonaland East, and Mashonaland West, including areas previously nearing elimination.  Similar increases are being observed across other countries in Southern Africa Region. The surge has been linked to heavy rainfall during the 2025–2026 season, which created favorable mosquito-breeding.  Meteorological forecasts predict increased rainfall across southern African countries in the upcoming months. Given the already high malaria case numbers from January to May 2026 in Namibia, Botswana, and Zimbabwe, it is possible that these countries will face heightened malaria risk from June to August, even in areas where risk is typically moderate during these months. 

The Pan American Health Organization (PAHO) has published Public Health Recommendations for travelers attending the 2026 FIFA World Cup.

A man from Ramanattukara, Kozhikode, Kerala, was tested positive for Nipah on 11 June 2026. The patient is in critical condition. The infection is suspected to be linked to bat exposure while cleaning a storage facility. A total of 77 contacts have been identified.  Nipah virus outbreaks have been reported previously in Kerala and other states of India.

The Swiss Federal Office of Public Health has launched an awareness initiative at airports to promote mosquito bite prevention during travel and for up to 14 days after return. The initiative aims to reduce the risk of importing mosquito-borne viruses such as chikungunya, dengue, and Zika into Switzerland.