But wait, does that mean the CDC is lying? I cannot possibly fathom a bought entity endorsing that!Studies have shown either no difference between masks and no masks in post operative wound infection, or a higher incidence of wound infection with masks than without. Studies have also shown no difference between n95 masks and surgical masks in preventing the spread of respiratory viruses. Of the standard face masks, N95 have been the only ones shown to prevent infections, and only bacterial infections.