The change follows infections appearing to have peaked in the state on February 4.

Check-ins were removed at venues where proof of vaccination is not required, such as supermarkets, retail outlets, hairdressers and gyms, as of Monday.

But the app still provides an easy way to check the vaccination status of patrons at pubs, clubs and cafes, Health Minister Yvette D'Ath said.

"We are still requiring mandatory vaccination for customers and consumers in those high risk settings," she said.

"Businesses are still having to ask people whether they're vaccinated or not, so that check-in is actually helping them do that."

The removal of the measure was welcomed by Brisbane Lord Mayor Adrian Schrinner, who said "it didn't make much sense" since the state wasn't using it for contact tracing.

"It's fantastic to see common sense has prevailed," he said.

The move comes as COVID-19 patient numbers sit at 724 across all public and private hospitals, 43 of whom are in ICU.

"The trend ... is rapidly down across Queensland, and we're expecting to see that trajectory to continue throughout February," Chief Health Officer John Gerrard said.

Of the 19 deaths reported on Monday, all were aged over 60 and 10 were aged care residents.

Only one person had received a booster, and nine were unvaccinated.

There have been 151 deaths in aged care in Queensland since the start of the pandemic.

Meanwhile, Queensland children returned to class on Monday with authorities saying an outbreak in schools is inevitable, but it is unlikely any will be shut down.

Face masks are mandatory in high schools and strongly recommended for students in years three to six, while schools must ensure adequate classroom ventilation.

Just under 40 per cent of five-to-11-year-olds have had one vaccine dose.

Case numbers are expected to increase as students head back to the class room and workers are encouraged to go into the office.

"Thankfully this is not happening at the same time as we are peaking across Queensland," Ms D'Ath said.

The state is "just .03 per cent from hitting the 90 per cent double dose mark", Premier Annastacia Palaszczuk tweeted on Monday.

"Thank you Queensland," she posted.

Australian Associated Press