Influenza in Brazil: surveillance pathways

Area of Science:

• Public Health
• Virology
• Epidemiology

Background:

• Influenza poses a significant global health challenge.
• The World Health Organization has monitored influenza viruses since 1947 to guide annual vaccine development.
• Effective surveillance is crucial for timely public health interventions.

Purpose of the Study:

• To describe the structure of influenza surveillance in Brazil.
• To highlight the importance of virological surveillance and diagnostic laboratories.
• To detail the expansion of surveillance strategies for improved detection and response.

Main Methods:

• Sentinel surveillance complemented by universal notification of severe acute respiratory syndrome (SASI).
• Investigation of outbreaks, deaths, and unusual events.
• Monitoring of hospitalization and mortality data for expanded surveillance.

Main Results:

• The study outlines Brazil's integrated influenza surveillance model.
• It emphasizes the role of diagnostic laboratories in virological surveillance.
• The expansion includes animal surveillance and interagency information sharing.

Conclusions:

• Brazil's surveillance model combines sentinel and universal approaches for comprehensive influenza monitoring.
• Interagency collaboration and data sharing are vital for enhancing response capabilities.
• The described system aims to improve the detection and management of influenza and related respiratory illnesses.