![](https://qb3.berkeley.edu/wp-content/uploads/2021/06/20210221_Fletcher_AVL_0105-1045x675-1-300x194.jpeg)
The health lab in your pocket
June 01, 2021
The lack of widely available testing has been a major roadblock to containing a virus that people can spread without showing, or even feeling, any symptoms. A COVID-19 test is Dan Fletcher’s latest transformation of cell phones into mobile diagnostic tools.