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Table 2 Surgical masks versus FFP2, specification according to EN standard

From: Risk of SARS-CoV-2 transmission by aerosols, the rational use of masks, and protection of healthcare workers from COVID-19

Certification/ Class (Standard) FFP2 (EN 149) Type II Surgical Mask (EN 14683)
Protection Protection of the carrier against solid and liquid aerosols Protection against droplet ejection from the carrier*
Application Self protection / Industrial safety External protection*
Filter performance – (must be ≥ X% efficient) 0.3 Microns ≥94% 3.0 Microns: ≥ 98%
0.1 Microns: No requirement
Total inward leakage ≤ 8% leakage (arithmetic mean) No requirement
Exposure to of inert particles and live aerosolised influenza virus Estimated 100-fold reduction** Estimated 6-fold reduction**
  1. *This description meets the requirements of the EN standard. However, the evidence described in the body of the article and many years of experience show that surgical masks provide sufficient self-protection
  2. **According to the Health and Safety Laboratory for the Health and Safety Executive 2008, https://www.hse.gov.uk/research/rrpdf/rr619.pdf