Labor's health spokesman Ryan Park said anyone who bites, scratches or spits at any emergency or health worker would be compelled to take an immediate blood test under the proposed legislation.

Currently frontline workers have an anxious six-month wait after any assault to see if they've contracted a blood-borne disease.

"This legislation will make it very clear to these thugs who think it's okay to assault police and frontline workers that not only will you be charged, but you will be compelled to give a blood test if there has been an exchange of fluids as part of the attack," Mr Park said.

"We are seeing around 50 police officers alone getting assaulted every week.

"This government must support this legislation and provide them with some clarity over the likelihood of them contracting a disease."

Labor announced the policy on Wednesday as part of its Respect Our Cops campaign, with leader Jodi McKay promising to introduce a bill to NSW Parliament "at the earliest possible opportunity".

Ms McKay said other states had similiar laws and it was "high time" NSW followed suit.

"If we can give a police officer or others on the frontline peace of mind that they are not infected then I am all for that," she said.

Ms McKay said many police officers had called for a change in the law, while a 2019 survey by the Health Services Union revealed more than 99 per cent of paramedics supported mandatory tests.

Mr Park said there was currently no capacity in the law to compel someone who had infected a frontline worker to give a blood test.

"I have spoken to paramedics and police and the situations they deal with every day often result in placing themselves in risky situations," he said.

"I want them to know we have their back and this legislation that I am proud to have been a part of developing is an example of that support."

Attorney General Mark Speakman said the safety and welfare of frontline workers in police, corrections, emergency services and the health sector were a "top priority" for the government.

"As I indicated publicly in September, the NSW Government has been working to develop a scheme which I anticipate will be announced shortly," he said.