Traveler-based Genomic Surveillance Data

What to know

  • As of May 14, 2025, this page summarizes data from individual travelers rather than pools of multiple travelers.
  • These data are not directly comparable with those shown on a previous version of this page from COVID Data Tracker (which showed pooled data).
  • Maps, charts, and data are updated weekly on Friday by 1pm ET.

Overview

Biosurveillance at international airports enables timely detection of communicable diseases of public health concern, including emerging variants of SARS-CoV-2, the virus that causes COVID-19, before new lineages circulate broadly within the United States.

CDC's Traveler-based Genomic Surveillance (TGS) program includes data from:

  1. Nasal samples from arriving international air travelers, and
  2. Airplane wastewater from individual airplanes or from multiple airplanes at a consolidation point (triturator), collected at several major international airports across the United States.
For Everyone About Traveler-based Genomic Surveillance

Data

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Content Source:
National Center for Emerging and Zoonotic Infectious Diseases (NCEZID)