When to use a surgical face mask or FFP3 respirator?
Surgical Face Mask vs FFP3 Respirator
The below pdf explains when to use a surgical mask or FFP3 Respirator.
https://www.rdash.nhs.uk/wp-content/uploads/2017/08/Appendix-47-Surgical-Face-Mask-FFP3.pdf
can click on the download button to read the instruction from NHS
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