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(A) Press-on tattoo sensors for monitoring lactate levels in sweat. Adapted from ref (565). Copyright 2013 American Chemical Society. (B) Paper surgical mask with embedded electrical sensor for monitoring respiration. Adapted with permission from ref (568). Copyright 2016 Wiley-VCH Verlag GmbH & Co. (C) Google Glass used for analysis of an RDT. Adapted from ref (515). Copyright 2014 American Chemical Society.
