The doctor-led clinic has tested 600 people since it opened last month, including 150 in the past week, with no positive results.

However, it is still not seeing as many men as women.

Orange Respiratory Clinic practice manager Ann Carter said schools and child care centres were referring students and children to be tested.

"We're seeing about 48 [people] a day which is great. It is pretty much fully booked," she said.

Ms Carter said they had just recruited another nurse to do the testing which meant the clinic capacity could be increased to 60 people a day.

"It's a range of people, lots of school aged children, lots of workers," she said.

Ms Carter said Kinross Wolaroi School was paying attention to its boarders showing any flu-like symptoms. "The boarding house of Kinross would be considered a high-risk environment," she said.

Ms Carter said the colder weather was also leading to more people with symptoms.

She said people needed to book for a test, but only those with symptoms would be tested. "There has to be a flu-like symptom, a sore throat, a runny nose, fever," she said.

A WNSW Primary Health Network spokesman said it was concerned not enough men were being tested.

"Unfortunately, the ratio of men visiting the region's respiratory clinics has not improved as patient numbers have increased," he said.

"We certainly hope that this does not mean that the men of the region are putting the health of those close to them at a greater risk of illness or contracting COVID-19," the WNSWPHN spokesman said.

"To date the Orange clinic is yet to detect a positive test result, but this should not encourage complacency," he said.

"We and the public need to continue to be as vigilant as ever, especially as public restrictions continue to ease."

He said the clinics would continue to operate until the second half of August.

"However, this may be extended, pending contracts reviews being conducted by the [federal] government and the Department of Health," he said.

WNSW Local Health District health protection manager Priscilla Stanley said there had been about 6400 tests at public hospitals, respiratory clinics and mobile clinics across western NSW in the past four weeks, and all were negative.

She said people being tested were being asked to receive negative results via a text message.

"If you're having a COVID-19 test in a public hospital or in the mobile services operated by the WNSWLHD, then you are eligible to register to receive negative test results by text message," she said.

"Everyone who has a test is asked to isolate until they receive their results.

"The messaging service is easy to register for, and means you get negative results quickly."

"If people have a positive result, they are contacted by a public healthcare worker who will provide information on what happens next."