Officials don't know how or where a handful of people became infected, sparking an order for increased testing from Premier Annastacia Palaszczuk.

"It wasn't from someone who had been overseas, it wasn't from a confirmed case," Ms Palaszczuk said on Monday.

"I'm going to be asking healthcare workers to increase the people they are testing, even if they don't have any travel history.

"And I've asked for that to be done in the Gold Coast, in Brisbane and in Cairns, because that's where we've seen those cases."

Fourteen new cases of the virus were confirmed on Monday, bringing the state's infection total to 921, with 173 people now fully recovered.

Ten of the 12 Queenslanders in hospital are on ventilators while the state's death toll stands at five.

The latest figures come as The Royal Queensland Show has been cancelled and Gold Coast beaches at The Spit, Surfers Paradise and Coolangatta have been closed due to the coronavirus.

Organisers announced on Monday the agriculture show known as The Ekka would not go ahead in August amid a state-wide shutdown to stem the spread of the infection.

It is the third time the event has been called off in the 143 years it has run.

It was previously cancelled in 1919 due to the Spanish Flu epidemic and in 1942 when the Brisbane Showgrounds were used as a World War II staging depot.

The showgrounds have been earmarked as a location for a temporary COVID-19 treatment centre for patient overflows from hospitals.

Australian Associated Press