I don't know, that's for sure. The following is from the Mayo Clinic

N95 masks
Actually a type of respirator, an N95 mask offers more protection than a surgical mask does because it can filter out both large and small particles when the wearer inhales. As the name indicates, the mask is designed to block 95% of very small particles. Some N95 masks have valves that make them easier to breathe through. With this type of mask, unfiltered air is released when the wearer exhales.

Please tell me how UNFILTERED air protects the people around you if you have Covid?