KN95 mask are respirator masks made according to China’s standards, and although very similar, there have been some differences in the breathability, and observed inconsistencies in the level of particulate filtration, which have been found upon testing conducted in Ottawa and the US (See quote and reference links below). So, while KN95 masks may be acceptable for average consumer use, it is not considered safe for healthcare standards where a nursing student/ healthcare provider would be working in an environment with a high risk of direct exposure to various microscopic infective particles. Furthermore,
“Health Canada indicates the N95 and KN95 standards are similar "with respect to design, filtration, performance and materials standards." However, it says that "recent testing performed by the CDC resulted in concerns with some KN95 respirators (specifically those with ear loop design) that pose a difficulty in achieving a proper fit, which is essential for use." (Source: https://healthycanadians.gc.ca/recall-alert-rappel-avis/hc-sc/2020/73063a-eng.php)
With that said, at this time we must continue to adhere to the list of healthcare provider approved masks referenced above. Please also ensure that your mask fit-testing provider is utilizing masks approved for Healthcare provider use and that their testing services are conducted in accordance with the CSA Standard CAN/CSA-Z94.4.02.