Novel Masks for Disease Prevention and Methods for Producing the Same

Among others, the present invention provides masks each with mask filter or mask body comprising one or more filter layers fabricated by integrated circuit fabrication processes. Such filter layer includes well-defined and substantially uniform pore size, and allows the mask to be washable and reusable. The prevention invention also provides methods for fabricating a single layer or multi-layer mask body or mask filter to be incorporated by a face mask.