Dengue Fever in Peru
Peru's Amazon jungle cities are dengue hotspots year-round, with 2023 seeing a record 300,000+ cases driven by El Niño conditions.
Key Data
| Metric | 2023 Data |
| Total cases 2023 | >300,000 (record) |
| Deaths 2023 | >400 |
| High-risk regions | Loreto, Ucayali, San Martín, Piura, Tumbes |
| Low/no risk areas | Lima, Cusco, Andean highlands >1,800m |
| Health authority | MINSA (Ministerio de Salud), Peru |
The Amazon Jungle Cities
Iquitos, Peru's largest city accessible only by air or river (population ~500,000), has endemic dengue year-round. The city's isolation, limited piped water (driving container water storage), and tropical Amazon climate create ideal Aedes conditions. Healthcare capacity is limited; severe dengue cases often require evacuation to Lima.
Lima: Unusually Low Risk
Lima, despite being a major city of 10 million, has very low dengue transmission due to its coastal desert climate — the Humboldt Current creates cool coastal temperatures and a lack of rainfall that limits Aedes breeding. This is unusual for a major South American capital. El Niño years can temporarily increase risk as warming disrupts this pattern.
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FAQ
Machu Picchu (2,430m) and Cusco (3,400m) are at altitude too high for Aedes aegypti — dengue risk is negligible. However, tourists visiting Amazon jungle lodges in Madre de Dios or Iquitos face real dengue exposure and should use DEET repellent and protective clothing.
El Niño caused record rainfall in coastal Peru (normally very dry) and elevated temperatures across the Amazon basin, dramatically increasing Aedes breeding. All four DENV serotypes circulated simultaneously, and DENV-2 (higher severe disease risk) was dominant in several regions.
Sources: Peru MINSA dengue reports; PAHO Americas 2023 dengue record; WHO situation reports.
Related: Dengue overview · Colombia dengue · Brazil dengue