How a handful of employees at Apple quickly pushed forward the development of a contract tracing API and collaboration with Google in less than a month (Christina Farr/CNBC)

Christina Farr / CNBC:
How a handful of employees at Apple quickly pushed forward the development of a contract tracing API and collaboration with Google in less than a month  —  - Apple and Google announced a partnership to bring contact tracing to smartphones on April 10th.  Their software toolkit will be released on Friday.