Canadian Standards Association (CSA) has called for universal respirator use in healthcare settings & when performing patient care outside of healthcare settings (eg – in the home) in the latest edition of CSA Z94.4, Selection, use and care of filtering respirators.
How you can help:
The draft CSA Z94.4 Standard is now out for Public Review until August 19, 2025.
Please weigh in with your positive, constructive comments at .
The draft Standard embodies the Precautionary Principle.
In the absence of risk analysis, N95s are required because healthcare spaces & activities involve daily HCW exposure to Risk Group 2 (RG 2) pathogens like Influenza and RG3 pathogens like SARS-CoV-2, often unknown.
hopefully we can all take the temperature down a few notches, after all, we're all trying to make the system better. 😊
Let's start with 20 ACH Laminar Air Flow (LAF) in ORs. Good idea from the 1960s & generally an improvement over lower airflows.
@alijzimmerman @naner81 @GhostOfSocrates @N0nyM00se @doctor_zeest Does it stop all airborne transmission?
Sadly, no.
Is it the best approach to stopping airborne transmission?
Sadly, no.
Does the medical community think it's the best approach to stop airborne transmission?
Sadly, yes. 😢
@alijzimmerman @naner81 @GhostOfSocrates @N0nyM00se @doctor_zeest First, several systematic reviews and comparative studies have shown that LAF is no more effective than Mixed Ventilation (MV).
Some comparative studies have shown MV to be superior
Because Hospital Acquired Infections are way too high & flash disinfecting air & surfaces immediately after occupancy, especially in hospital bathrooms, is a game changer for protecting patients (& HCWs) from exposure to pathogens
Because air and surfaces that are biologically clean don't transmit disease
I would be excited about this inhaled Covid vaccine being developed at McMaster if it was a traditional protein-based vaccine delivering a known volume of antigen(s) (similar to Novavax)