The Member for the Dubbo Electorate rejects on health and economic grounds that there might be a need to stop Sydneysiders from entering country communities.

"I think it's fine as long as everyone is doing the right thing," he said after a COVID-19 alert was issued for Broken Hill, Nyngan and Orange.

What's more, the MP doesn't want regional businesses such as pubs, clubs, restaurants and cafes to again pay the price of an unprecedented pandemic.

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"..if we put a hard border in and said we don't want people driving over the mountains for example, that does create an issue for a lot of businesses," he said.

But Mr Saunders draws the line at people who are sick making their way west.

"We don't want people coming if they're feeling unwell," he said before suggesting people living in and out of the region might "think about" whether they need to travel.

The MP continues to reiterate the importance of "doing the right thing" by checking in and out of venues, washing and sanitising hands regularly, and wearing a mask when social distancing is not possible or when people feel "uncomfortable".

"I think what this shows is somebody right next to us could have COVID at any stage so you need to be aware of that and that means doing simple things right," he said.

Contact tracing began after the teenager, who returned a positive test in Sydney, camped at Nyngan and Broken Hill, and stopped at an Orange eatery on Sunday.

Testing has been ramped up in the three communities.