| 摘要 |
A method of preventing or limiting the spread of germs which involves providing a mask that can adopt an erected operative configuration and a compacted configuration in which the mask can be accommodated in a pocket or purse of a user. When released, the mask springs open to its erected configuration and can be placed over the mouth and nose of the wearer to prevent outward expulsion of material during a cough or sneeze. The mask includes an opening for releasing excess air from within the mask, the opening being closed by a filter. The filter is designed to retain inside the mask, germs normally expelled during a sneeze or cough.
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