Argentina's Zika Outbreak Records 730 Cases in 2025

Since the Zika virus was first detected in the Region of the Americas in May 2015, the Pan American Health Organization (PAHO) has published counts of cases reported by member countries.

However, given the high proportion of asymptomatic individuals infected with the Zika virus, the lack of specificity in clinical presentation among cases, and the complexity of laboratory diagnosis in the context of co-circulation of closely related viruses such as chikungunya and dengue, underreporting of Zika virus cases is probable, wrote the PAHO.

While Brazil has been the multi-year leader in reporting Zika cases, the Argentine Republic has been confronted with a measurable outbreak in 2025.

As of September 2, 2025, the PAHO reported 730 Zika cases for the year. This data compares with 564 cases for all of 2024.

Currently, the U.S. CDC has not issued a Travel Health Advisory regarding Zika in Argentina.

However, the United Kingdom Travel Health Pro states there is a risk of the Zika infection in this country. Specific affected areas within Argentina where mosquitoes are spreading the virus are not available.

Both the CDC and the UK confirm that pregnant women should discuss the suitability of travel and the potential risks that the Zika virus may present with their healthcare provider before traveling abroad.

From a prevention and treatment perspective, no Zika vaccine or medication is expected to be available in 2025.