Costa Rica Ministry of Health reports a suspected case of yellow fever

News release (Machine translated):

Saturday, October 11, 2025. This is a 29-year-old American patient from the Amazon region who presented symptoms since October 7 and entered the country on October 8, 2025. According to available information, the patient had not been vaccinated against yellow fever.

The patient showed signs compatible with the disease and, after receiving initial care at a private hospital, underwent the corresponding tests, which raised suspicions of yellow fever. This Saturday, her transfer to a CCSS hospital was arranged, where she will continue receiving specialized medical care, pending diagnostic confirmation from the INCIENSA laboratory.

The Ministry of Health reiterates its recommendations to people planning to visit countries endemic for yellow fever, such as Bolivia, Brazil, Ecuador, Guyana, French Guiana, Panama, Peru, and tropical African countries. We also remind those traveling to Colombia that the yellow fever vaccination is mandatory.

The most common symptoms include fever, headache, chills, muscle aches, fatigue, nausea, and vomiting. In severe cases, jaundice (yellowing of the skin and eyes), bleeding, abdominal pain, and liver or kidney complications may occur. If you have visited any of the countries mentioned above and experience any of these symptoms, it is recommended that you seek medical attention immediately.

It is recommended to take the following preventive measures:

• Get vaccinated against yellow fever at least 10 days before your trip.

• Maintain protective measures against mosquito bites, such as using repellent, long-sleeved clothing, and mosquito nets.

• Consult a healthcare professional before travel and if you experience any symptoms after returning.

The Ministry of Health continues its epidemiological surveillance and works in coordination with national health services to ensure the safety and protection of the population.