The positives and negatives of mass testing for coronavirus
- Written by Jennifer MacLachlan, Epidemiologist, WHO Collaborating Centre for Viral Hepatitis, The Peter Doherty Institute for Infection and Immunity

Manyjurisdictions around the world are now testing people without symptoms as part of efforts to manage COVID-19. In Victoria, asymptomatic health-care workers have been part of the recent “testing blitz”.
We tend to take for granted that the results of medical tests are accurate – but no test is perfect and all carry...