Handling Prions Recommended Biosafety Practices for Handling Prions and Prion-Infected Tissues
—”Note the bit about, up til then anyway, no documented cases of lab acquired infections...”
In the 1970s I worked in this building:
https://architecture.uchicago.edu/locations/cummings_life_science_center/
IIRC it was considered a level 3 facility, Atlanta was a level 4 and had burners that heated ALL the discharged air.
The stacks on the side of the building are exhaust air.
All of the air in the building comes in and goes straight out above the roof.
From the Cummings lab:
“Another laboratory-acquired infection may have occurred in a University of Chicago building where 2 years ago a researcher contracted plague and later died. Late last month, a researcher who worked in the same general lab area was hospitalized with a skin infection caused by a common bacterium being studied in her lab.”
https://www.sciencemag.org/news/2011/09/updated-university-chicago-microbiologist-infected-possible-lab-accident