The child contracted the virus in India, which continues to report sporadic H5N1 outbreaks in poultry.
Among 49 jurisdictions with H5 virus testing capacity, 29 (59%) reported testing respiratory specimens from symptomatic people since January 2022.
The group will use the H5 probe to test samples from all 190 WastewaterSCAN sites and share the information with local public health officials and on its dashboard.
In other developments, H5N1 has been detected in cats from South Dakota with no known links to poultry or dairy herd outbreaks.
Federal officials said it's unclear if dairy cow outbreaks are peaking, and they haven't made much headway testing farm workers for avian flu virus.
Of the three newly confirmed outbreaks, two are in Michigan and one is in Idaho.
The tracker will help with surveillance, but it doesn't distinguish the influenza A subtype or determine the source of the virus.
Wastewater detections began in early March, and so far sequencing hasn't found any mutations linked to human adaptation.
The assistance is meant to both improve on-site biosecurity and address financial losses connected to lost milk production in herds affected by H5N1.
Monitoring of about 70 farm workers found no symptoms, and the state's wastewater sampling pilot has found no flu rise.
