As the COVID 19 death toll continues to rise, researchers and public health professionals around the world are working to understand just how prevalent the disease is. News stories of the last several months have talked about contact tracing and featured images of drive through COVID testing. One of the issues that has come up with testing is whether we should test people who don’t show signs of infection. That’s the focus of this episode of Stats and Stories, with guests Nick Fisher and Dennis Trewin. Nick Fisher left his position as Chief Research Scientist at CSIRO in 2001 to found ValueMetrics Australia, an R&D consultancy that carries out R&D in Performance Measurement, in which area he has consulted to a wide variety of business, industry and Government clients in Australia and overseas. He is a Past President of the Statistical Society of Australia and of ISBIS, and was founding Editor-in-Chief of the ISI online journal Stat. Dennis Trewin was trained as a Statistician but has had 40 years of executive management experience in official statistics in Australia and New Zealand. He was the Australian Statistician from 2000 to 2007. He has also been an Electoral Commissioner and an Associate Commissioner at the Productivity Commission. He has chaired and been a member of Boards/Councils in the superannuation and university sectors. He is the current Chair of the Australian Mathematics Trust.