In the face of Coronavirus outbreak, Hospital Authority(HA) was unable to provide medical staff with protective items meeting WHO recommendation specialised for WARS.
From the graph above, it is shown that masks provided by HA only meet the standard of ASTM Level 1.
- BFE (Bacterial Filtration Efficiency) for 3 micron block pollen, flying maggot
- PFE (Particle Filtration Efficiency) for 0.1 micron blocks viruses such as influenza and SARS
- VFE (Virus Filtration Efficiency) for 0.1 to 5 microns
ASTM F2100-11 divides mask materials into 3 levels: first level protection (BFE), second level protection (PFE), and third level protection (VFE)
Source: The Hong Kong General Union of Physiotherapists