KGTV: U.S. Efforts To Track COVID-19 Variants Face Key Limitations
Scientists say more work needs to be done to address a key limitation in the nation's early warning system.
![](https://ewscripps.brightspotcdn.com/b8/55/4375d9664873ae93d20287f22782/1622046383-khc8aa.jpg)
![](https://ewscripps.brightspotcdn.com/b8/55/4375d9664873ae93d20287f22782/1622046383-khc8aa.jpg)
Posted
Copyright 2024 Scripps Media, Inc. All rights reserved. This material may not be published, broadcast, rewritten, or redistributed.