And regarding the decision to classify "close contacts" as people who have been within a 1.5m distance for 15 minutes—this may have been based on research from Japan for when people are in an open space, and the air is moving.
COVIDSafe would not be able to alert people exposed to the virus via a solid surface, such as a shopping trolley or elevator button, if the person who contaminated that surface had already left the scene.
False positives COVIDSafe uses Bluetooth to digitally "trace" people with whom a user has come into contact, with the aim of alerting anyone who has interacted with a confirmed COVID-19 case.
The COVIDSafe app may not be able to overcome its shortcomings May 18, 2020 by Dinesh Kumar and Pj Radcliffe, The Conversation Credit: Shutterstock The Australian government's contact-tracing app, COVIDSafe, has been touted as crucial for restarting the country's economy and curbing COVID-19's spread.
What's more, COVIDSafe can't fulfill its contact tracing potential until it's downloaded by a critical mass of people who have already contracted the virus.