I’ll see what else I can find later, but for now...
https://www.phe.gov/s3/BioriskManagement/biocontainment/Pages/BSL-Requirements.aspx
Scroll down to the bit on Biosafety Level 3 Safety Equipment.
“Safety equipment
Appropriate PPE must be worn, and respirators might be required.
All work with infectious agents or toxins must be performed within an appropriate biosafety cabinet​.”
I don’t think N-95s are gonna cut it.
Likely they will all get sick anyway because covid is the most contagious and deadly disease since the Black Death, to hear them tell it.