As the region's students begin the 2020 school year, parents across NSW whose children have come in contact with someone who has a confirmed case of coronavirus are being urged to keep them at home and monitor for possible symptoms.

As of Tuesday, there were four confirmed cases of coronavirus in the state, with another six cases being investigated, according to NSW Health, which has not released details of where patients are being treated.

Tracey Oakman, the director of public health for the Murrumbidgee Local Health District, said children who had been exposed to a confirmed case should be kept away from school or daycare for 14 days, which is believed to be the illness's incubation period.

"This is because, largely, children are a little bit less likely to be able to let you know they have symptoms in a timely way," Mrs Oakman said.

Mrs Oakman said anyone with concerns about the coronavirus should call Healthdirect on 1800 022 222.

"Healthdirect has a nurse there who will triage callers, and then appropriately get them into the system if they meet the criteria," she said.

NSW chief health officer Kerry Chant said students who have travelled to Wuhan and Hubei during the summer holidays can return to school, but should be carefully monitored for symptoms of coronavirus infection.

"The most common symptom is a fever," Dr Chant said.

"Other symptoms include, cough, sore throat and shortness of breath.

"Anyone who exhibits these symptoms should be isolated immediately from other people and seek medical attention as soon as possible.

"If you develop a fever, a cough, sore throat or shortness of breath within 14 days of travel to Hubei or contact with a person with confirmed coronavirus, you should immediately isolate yourself from other people. Contact your GP or your emergency department or call the healthdirect helpline 1800 022 222 and seek medical attention as soon as possible."

Charles Sturt University has also said it is "actively monitoring events as the coronavirus outbreak evolves".

"The university is communicating with students and staff to ensure they have information regarding latest advice from NSW Health, hygiene tips, and access to government travel advice," a statement reads.

"The health and safety of our staff, students and communities, both domestically and internationally, is of paramount concern to the university and we will continue to liaise with the appropriate bodies to assist in our response.

"We encourage all staff and students to check the latest updates from NSW Health and follow the advice of the government if they have concerns regarding exposure to coronavirus."