Public Health Surveillance
7 articles
How case-based, syndromic, and event-based surveillance systems detect and track disease.
Indicator-Based vs. Event-Based Surveillance: Two Signals, One Early Warning System
Case counts and internet rumors serve different roles in outbreak detection. Here is how indicator-b...
Sentinel Surveillance: How a Handful of Clinics Track a Country’s Disease Burden
Sentinel surveillance samples a few clinics and labs instead of counting every case, and it underpin...
Wastewater Surveillance: Reading a Community’s Health From Its Sewage
How wastewater-based surveillance detects polio, COVID-19, and other pathogens days before clinical...
Syndromic Surveillance: Detecting Outbreaks Before a Diagnosis Exists
How syndromic surveillance flags outbreaks from symptoms alone, and why it sits apart from case-base...
Understanding Public Health Surveillance: Passive vs Active Systems
Public health surveillance forms the cornerstone of disease prevention and control efforts worldwide...
What Public Health Surveillance Demands From Field Equipment
Surveillance is only as good as the gear behind the case definition. We map the equipment that turns...
From Signal to Response: What Makes Field Surveillance Work
Surveillance is only as good as the action it triggers. A measured look at the gap between detecting...