As of 27 July 2026 (epidemiological week 28), Costa Rica reported 2’194 cumulative dengue cases, including 38 cases with warning signs and four hospitalizations. Cases are 17% higher than during the same period in 2025.
The Central Pacific region has the highest incidence rate, while Alajuela Province has the largest number of cases. Orotina canton is the most affected area by incidence, with 1’042 cases per 100’000 inhabitants. Cases are evenly distributed between males and females.
Health authorities have identified major outbreak hotspots in Orotina and La Guácima, where vector control measures, including breeding-site removal and fumigation, are underway.
Note: Costa Rica is also at an outbreak level for chikungunya (See healthytravel website and CDC).
Prevention: Optimal protection against mosquitoes 24/7, including against other mosquito-borne diseases.
Vaccination: The Swiss Committee of Experts in Travel Medicine (ECMV) recommends vaccination with Qdenga® only for travellers over 4 years of age who have already contracted dengue; see the position paper of the ECTM.
In case of fever:
- Make sure you hydrate enough and take paracetamol medication to relieve symptoms.
- Avoid taking medications containing acetylsalicylic acid (e.g., aspirin®), as this can increase the risk of bleeding in the event of a dengue infection. However, do not stop taking medications containing acetylsalicylic acid if they are already part of your regular treatment for an underlying condition.