When you think of micro- or nanotechnology, you likely
think of small electronics like your phone, a tiny robot or a
microchip. But COVID-19 tests—which have proven to be central to
controlling the pandemic—are also a form of miniaturized
technology. Many COVID-19 tests can give results within hours
without the need to send a sample to a lab, and most of these tests
use an approach called microfluidics.