The Colombian government has declared a health emergency due to a surge in yellow fever cases, with 54 cases and 22 deaths this year, up from 77 cases and 35 deaths in 2024. The emergency has led to a widespread vaccination campaign aimed at children from nine months to 59 years of age, with the vaccine being free and providing immunity within 10 days in 95% of recipients. The emergency was declared in response to the spread of the disease in several departments, with Tolima being the most affected. Yellow fever is a viral disease transmitted by mosquitoes and causes symptoms such as fever, headache, and muscle pain, and in severe cases, it can lead to liver and kidney failure.