Face mask fallacies                                                     

We’re becoming more germ-conscious and in the face of the Ebola epidemic and several recent influenza scares we ought to be. One of the means being promoted to avoid infection is the face mask, specifically the oval N95 version. Unfortunately it gives the wearer a false sense of security when there are more effective ways to prevent contagious diseases.

The primary purpose of a face mask is to keep an infected person from spreading bacteria or viruses to others. Surgeons and their assistants in the operating room are not carrying disease but some otherwise harmless bacteria in their throats or noses could contaminate the surgical field and cause a wound infection. Masks will also protect the nose and mouth of health personnel from splashes of blood or other body fluids that may be contaminated.

Persons who work in a dusty environment, even woodworking hobbyists for example, do get some protection from wearing a face mask but it’s not total. The designation N95 indicates that when properly fitted the mask will filter at least 95 percent of airborne particles. That’s alright if the contaminant is sawdust but not if it’s a virus such as influenza. Floating bits of sawdust will be trapped in the nasal passages but if a virus lands there it’s game over and the virus will claim another victim.

Everyone’s face is differently shaped but N95 masks are quite uniform. Pressing the nasal clip doesn’t change much. For small children and persons with facial hair there is even less protection. A mask that is worn for a long time becomes wet from breath or saliva and loses efficiency. These are single-use items and should not be re-used or worn by another person.

There are other measures that anyone can take to avoid infection during the influenza season, the most important one being to get the flu vaccine. It’s not perfect but it does reduce the likelihood of severe disease, which in turn lowers the risk of deadly secondary infection.

Handwashing with ordinary soap and water is tried and true and that has been confirmed by recent studies. The key is to lather long and often, especially after touching doorknobs, computer keyboards and other people’s hands. In a public restroom, close the faucet tap and open the door with a dry paper towel.

If it makes you feel safer, go ahead and wear a mask. You will still need a flu shot.