Emory University
Atlanta research university whose PLOS Biology study found H5N1 in milking-parlour air, reframing PPE guidance.
Last refreshed: 7 May 2026 · Appears in 1 active topic
Will the Emory aerosol findings force CDC to update dairy-worker H5N1 respiratory guidance?
Timeline for Emory University
Sampled 14 California dairy farms and detected H5N1 in submicron aerosol particles and pre-symptomatic milk
Pandemics and Biosecurity: Emory aerosol study reframes dairy PPE- What did the Emory University H5N1 study find on dairy farms?
- The Emory PLOS Biology study found H5N1 in submicron aerosol particles in milking-parlour air, wastewater, and exhaled cow breath across 14 California farms. Cows shed virus before showing clinical signs.Source: PLOS Biology / Emory University
- Does the Emory study mean dairy workers need different face masks?
- The study suggests aerosol exposure is a real route, which is prevented by respiratory protection rather than the contact precautions (gloves, eye shields) in current CDC guidance. CDC had not updated guidance as of 7 May 2026.Source: Emory / CIDRAP
- Is Emory University connected to the CDC?
- Emory's Atlanta campus is a few miles from CDC headquarters and the two institutions have deep institutional ties, including joint faculty appointments and shared research programmes on Ebola, influenza and HIV.
Background
Emory University is a private research university in Atlanta, Georgia, founded in 1836. Its medical school and public health programmes rank among the leading research institutions in the United States. Emory is home to the Rollins School of Public Health and the School of Medicine, and has longstanding institutional ties with the CDC, which is headquartered a few miles from campus. Emory researchers have played significant roles in Ebola clinical care in the US (2014), HIV research, and pandemic influenza modelling. Its infectious disease faculty publish regularly in high-impact peer-reviewed journals including PLOS Biology, the New England Journal of Medicine, and The Lancet.
Emory University researchers published a PLOS Biology study in early May 2026 based on sampling across 14 California dairy farms with confirmed H5N1. The study detected H5N1 in submicron aerosol particles in milking-parlour air, in farm wastewater, and in the exhaled breath of cows. The clade detected in air samples was 2.3.4.4b B3.13, the same lineage behind 71 known US human H5N1 cases, confirming the dairy reservoir as the active human-spillover route. The findings are directly in tension with CDC's current dairy-worker guidance, which addresses contact transmission but not submicron aerosol exposure. As of publication, neither CDC, USDA nor PAHO had updated worker guidance to address the Emory findings.
