CDC-backed studies highlight wastewater surveillance as an early-warning tool for measles
New CDC-published research suggests wastewater monitoring can detect measles transmission earlier than clinical case confirmation—evidence that public health agencies say strengthens the case for maintaining and expanding national surveillance networks.
Two CDC-published studies add to the growing body of evidence that wastewater testing can provide early signals of infectious-disease spread—potentially days to months before cases are confirmed in clinics.
Researchers described how sewer-sample monitoring helped officials spot measles activity early in Colorado, while separate work in Oregon suggested wastewater indicators could have provided a much earlier warning before the first confirmed positive test.
Public health experts argue the approach complements traditional surveillance by capturing population-level signals that aren’t dependent on people seeking care or getting tested.
How it works (in brief)
- Collect wastewater samples from treatment plants or upstream sites
- Test for pathogen genetic material or biomarkers
- Track trends over time to flag rising transmission