This information came to light after Glencore confirmed it would not stop Fly-in-fly-out employees to Mount Isa Mines and Ernest Henry Mine.

Glencore said there were a range of measures put in place to minimise the spread of COVID-19.

"These include additional health screening for all fly-in fly-out employees/contractors at Ernest Henry," a Glencore spokesperson said.

"Screening is carried out by registered health nurses at Brisbane, Cairns and Townsville airports, PRIOR to the workers boarding their flights. Workers must pass the screening process, including a questionnaire on their health, recent travel history or contact with a confirmed COVID-19 case, as well as a temperature check.

"Glencore has also implemented a range of other measures across the businesses, including developing and implementing a Communicable Diseases Plan, identifying appropriate controls to assist with the prevention and further transmission of COVID-19, restricting visitors to our operations, stepping up the cleaning and sanitising of our work places, restricting business travel, increasing the use of video conferencing facilities in place of face to face meetings, developing quarantine and isolation procedures for our operations, and increasing a communication campaign to ensure everyone is doing their part in ensuring a safe and hygienic work environment."

Glencore said its COVID-19 Strategic Response Team was following a Trigger Action Response Plan which sets their response and actions against the situation as it continues to evolve.

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"We take the health and wellbeing of our employees and the communities in which we operate very seriously," a Glencore spokesperson said.

"Our approach is informed by expert medical advisors, state and federal governments, and global bodies such as the World Health Organisation.

"We are committed to keeping our workforce informed and provide regular and timely information about the evolving situation via email, noticeboards, dedicated Intranet information hub, Facebook and digital signage."

To date, there are no confirmed cases of COVID-19 within the Glencore's Copper and Zinc businesses in north Queensland or Australia.

There also remains no confirmed cases of COVID-19 in North West Queensland, with 40 people being tested returning negative results.

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