Aged-care services such as Meals on Wheels were preparing for possible changes on Monday as the number of confirmed COVID-19 cases reached 171 in NSW.

Julie Logan, the manager of Wagga's Meals on Wheels branch, said the service would continue but would make adjustments as more public health information was released.

"We'll follow all the advice that we get but to continue to deliver services," Ms Logan said.

Ms Logan said Meals on Wheels was dealing with the coronavirus on a "day-by-day" basis.

"It depends how long it goes for and how severe it is in Wagga. One of our bigger problems probably is if our volunteers get sick and we don't have enough people to replace them. That would be our biggest issue," Ms Logan said.

"We need to know if people are sick and do have the coronavirus so we can adjust the service to them accordingly."

Wagga's Meals on Wheels caters for 140 clients who are frail and aged over 65, who often have a chronic illness or have just come out of hospital and who might find it difficult to be isolated.

"If our clients had to self-isolate, we would arrange to deliver meals to them and leave them at the door ... perhaps that's what will happen, we won't go into the houses at all," Ms Logan said.

"I think it's very difficult for anyone to be isolated for that time. And I think it is difficult because they won't have the stores of food or other products that they need. A lot of them won't have extras I wouldn't think."

Woolworths is offering to supply a four pack of toilet paper to Meals on Wheels clients in NSW, which Ms Logan said will go out with meal delivery.

Wagga's Senior Citizens' Club, which caters for about 160 members, has cancelled all activities for the week ahead as a safety precaution, including a sit-down lunch for 60 people which was planned for Monday.

Club President Jim Weeden said he was "taking it week-by-week" and was "a bit worried going into winter".

"We might have to close for a few months," Mr Weeden said.

"Each person has to decide what they want to do."

Bill Kelleher, 80, was one senior citizen who arrived at the club on Monday to find its doors shut.

"Well I was a bit disappointed when I got here, that it wasn't open, but because of this disease that's getting around, if they've got to do it, they've got to do it. It's the right thing to do," Mr Kelleher said.

Mayor Greg Conkey said on Monday that nursing homes and senior citizens organisations were the most vulnerable in the city and needed to take extra safety precautions.

"I know there are some suggestions in nursing homes for people to wash their hands. If you don't need to go there please don't go there," Cr Conkey said.

"We're trying to work with the community to mitigate as many of these effects that we can."

On Tuesday, Prime Minister Scott Morrison announced strict new restrictions on staff and visitors to aged care facilities to protect residents from the virus.

Those unable to visit such facilities include people who have returned from overseas in the past 14 days and those who have been in contact with a confirmed coronavirus case.

*Those suffering acute, cold, flu-like symptoms who have recently returned from travelling or are a contact of a confirmed case are urged to be tested for the virus. To do this, call HealthDirect on 1800 0222 222 to be triaged and advised by a nurse over the phone. Alternatively, contact your GP to book an appointment and let them know in advance if you have symptoms - these might include fever, cough, runny nose or shortness of breath.