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The Foldscope is a fully functional microscope that can be laser- or die-cut out of paper for around 50 cents.

This bookmark-sized microscope can be assembled in minutes, includes no mechanical moving parts, packs in a flat configuration, is extremely rugged and can be incinerated after to safely dispose of infectious biological samples. With minor optics modifications, the microscope can be designed for brightfield, multi-flourescence or projection microscopy, or specialized to identify specific pathogens.