Costa Rica Reports First Yellow Fever Case in 70 Years

Why this matters: This case highlights the ongoing risk of imported diseases and the importance of vaccination, especially with increasing travel to endemic regions. It also demonstrates the need for strong public health surveillance and response systems.

Costa Rica’s health system is responding swiftly to contain the spread. Surveillance protocols have been activated to track potential contacts, and mosquito control teams are focusing on eliminating breeding sites. The Ministry of Health is emphasizing the importance of vaccination for those traveling to endemic areas.

The case underscores the interconnectedness of global health. As tourism rebounds, Costa Rica, with its popular rainforests and beaches, must remain vigilant. Travelers should consult guidelines from the Centers for Disease Control and Prevention (CDC) or their local health departments.

Since May 2025, Costa Rica has tightened entry rules, requiring proof of vaccination or a period in a low-risk area before entry for individuals traveling from or to high-risk countries. The single-dose vaccine offers lifelong protection, with usually mild side effects.

Symptoms include fever, headache, muscle pain, and in severe cases, organ failure, jaundice, and bleeding.

Yellow fever spreads through the bites of infected mosquitoes, mainly Aedes and Haemagogus species.

Get vaccinated at least 10 days before your trip and take preventive measures against mosquito bites, such as using repellent and wearing long-sleeved clothing.

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