Traveler-Based Genomic Surveillance Data

For Public Health

What to know

  • Data are updated weekly on Friday by 1pm ET. On federal holiday weeks, the data update may occur the following week.

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)
About This Page
Published: May 14, 2025
Updated: July 31, 2026

This page was last updated on this date. Updates may include minor edits, image changes, or other modifications to page content.

Reviewed: July 31, 2026

The information on this page was last reviewed by subject matter experts to ensure accuracy.