The Health Department has warned specialists they may be compelled to provide their fees if too few volunteer the information.
Seven million people have downloaded the app and registered to use it,Senate estimates heard on Monday.
The Health Department boss has conceded the federal government could have acted faster to contain the spread of COVID-19 through Victoria's aged care facilities.
Katy Gallagher,chair of the Senate's COVID-19 inquiry,says there must be greater transparency about the health advice given to national cabinet.
Australia is expected to soon take up full membership of a World Health Organisation-led body promising access to coronavirus vaccines.
Victorian Premier Daniel Andrews says a DHHS decision to send home all St Basil's staff and management was necessarily,but Dr Brendan Murphy says it won't happen again.
Uncertainty taints all aspects of living now - from going to the supermarket to isolating after a COVID-19 test to having a baby. And we don't know where we should seek information to help us make decisions.
The outbreak in Victoria has exposed complacency in many facets of our pandemic response.
We all live in hope that an effective vaccine will come along soon,but we should also consider what we will do if it does not.
Professor Brendan Murphy,having attended the Australian bedside for months during a pandemic,appears at his last press conference as Chief Medical Officer.
Brendan Murphy never imagined when he became Australia's Chief Medical Officer that he would become so recognisable he would resort to wearing dark glasses and a baseball cap to walk around Lake Burley Griffin with his wife.