More than $2 billion will be pumped into the NSW economy to soothe the financial fallout caused by the global pandemic.

NSW authorities are hoping a series of unprecedented measures will help contain the rapid spread of infection.

Residents flouting a ban on mass gatherings could be fined $11,000 or jailed for up to six months.

NSW Police will temporarily halt major roadside drug and alcohol testing operations amid hygiene concerns.

The number of confirmed COVID-19 cases in NSW almost doubled over the weekend and on Tuesday morning reached 210.

The University of Technology Sydney on Tuesday evening confirmed a student has been infected with COVID-19.

The University said 27 students and one staff member who had been in close contact with the student would now be required to self isolate.

Macquarie University in Sydney's northwest also confirmed a student had been diagnosed with the virus. Campus areas have been intensively cleaned and the university is temporarily suspending classes.

The University of Sydney will suspend face-to-face teaching and deliver all classes online from March 23.

The Sydney Opera House on Tuesday cancelled all public performances until March 29, while Australian Fashion Week has also been called off.

Music festival Splendour in the Grass has been postponed from July until October, while Groovin the Moo was cancelled outright.

Premier Gladys Berejiklian on Tuesday announced a $2.3 billion economic package to ease worries about the financial impact of the virus.

The stimulus package consists of $700 million for health care and $1.6 billion for job creation and tax relief.

Major features include capital works investments, payroll tax relief and waiving charges and licence fees for small businesses.

The $700 million for health services will help ramp up COVID-19 testing, establish dedicated fever clinics and double intensive care capacity.

"Our approach in relation to dollars in NSW will be first and foremost to save lives," Ms Berejiklian said in Sydney on Tuesday.

"I don't ever want to look back and think we should have done more. I want a no-regrets policy."

Lobby group Business NSW embraced the government's economic stimulus measures, saying they would help the business community.

NSW Labor also welcomed the package but said it didn't go far enough for small businesses.

"It is those mum and dad businesses that have two to five employees that are doing it tough right now," opposition leader Jodi McKay said in Sydney.

"Those businesses have been left behind in this stimulus package."

Health Minister Brad Hazzard says the state is on track to experience a "substantial exponential increase" in coronavirus infections.

As companies increasingly ask staff to work from home, Pymble Ladies College on Sydney's upper north shore said it will move to online learning from Thursday.

The Transport Workers Union says it is working with bus operators to protect drivers from the spread of the virus.

RSL NSW on Monday cancelled all public Anzac Day services across the state. The Sydney Writers' Festival has also been cancelled, as has the Sydney Royal Easter Show.

Over the weekend the Sydney Lyric Theatre announced it would remain closed to audiences until April 18 while the Capitol Theatre announced a number of shows in March and April would be cancelled.

NSW Senator Andrew Bragg on Tuesday revealed he was the third coalition politician to become infected.

Australian Associated Press