CDC Biosurveillance Program Surpasses One Million Air Travelers

Image: The Traveler-Based Genomic Surveillance (TGS) program launched in 2021. (Photo Credit: Eric Bowman)
Image: The Traveler-Based Genomic Surveillance (TGS) program launched in 2021. (Photo Credit: Eric Bowman)
Patrick Clarke
by Patrick Clarke
Last updated: 2:35 PM ET, Fri January 30, 2026

The Centers for Disease Control and Prevention (CDC) has seen its Traveler-Based Genomic Surveillance (TGS) program surpass one million voluntary participants, the U.S. Department of Health and Human Services agency announced on Friday.

The figure marks a significant milestone in the nation's ability to detect and respond to emerging public health threats at our borders, according to the CDC.

First launched in 2021, the program includes voluntary and anonymous sample collection from arriving international travelers at select U.S. airports, providing experts with early insight into emerging pathogens and variants before they spread broadly within the U.S.

The CDC examines nasal samples from anonymous participants and has also analyzed more than 2,600 airplane wastewater samples as part of its broader biosurveillance efforts, the agency said.

TGS is credited with reporting "the first two detections of influenza H3N2 subclade K to public repositories seven days before the next publicly reported sequence."

"The United States is the world's leading authority in public health. The broad participation of travelers enhances our ability to safeguard the nation using tools that are developed, operated, and governed here at home without reliance on unaccountable global bureaucracies," HHS Deputy Secretary and Acting CDC Director Jim O'Neill said in a statement.


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Patrick Clarke

Patrick Clarke

Senior Editor

A Maryland native and wanderer who has lived across the U.S. from North Carolina to SoCal, Patrick Clarke graduated from Towson University with a B.S. in journalism. He previously worked for Bleacher

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