Figure 2

Mean aerosol passage over time for (
) FFP2 and (
) KN95 certified masks. The gray background indicates a change in scale in the y-axis. The dashed line marks the 6% specification according to DIN EN 149.

Mean aerosol passage over time for (
) FFP2 and (
) KN95 certified masks. The gray background indicates a change in scale in the y-axis. The dashed line marks the 6% specification according to DIN EN 149.