Several businesses in Young have this week been declared sites of concern in the wake of an essential worker passing spending a number of days in town before being diagnosed with COVID-19.

The Cherry Blossom Hotel in Young was added to NSW Health's venues of concern late on Thursday evening.

NSW Health advises the hotel is a casual contact site and anyone who was at the venue over four days early in the month must get tested and self-isolate until they receive a negative result.

The days of concern are:

More recent visitors should also follow further precautions, get secondary testing and limit their interactions.

"If your date of exposure occurred in the last four days, you must get another test on day five from the date of exposure," NSW Health advised on its website.

"Wear a mask around others and limit your movements until you get another negative result.

"You should continue to monitor for symptoms and if any symptoms occur, get tested again."

The Murrumbidgee Local Health District is operating a walk-in clinic at the Young Town Hall from 1am to 4pm on Friday, and a drive-through GP-led clinic operates at the Young Showground on Murringo Raod between 9am and 3pm.

The Woolworths and BWS in Young were also listed as casual contact venues at the same time, between 3.15pm and 4pm on Friday, September 3.

The Sydney-Melbourne XPT is also of serious concern, with the passenger train listed as a close contact venue between Central Station and Albury on Sunday, September 12 between 7.43am and 3.18pm.

Anyone who was on the train that day must get tested and isolate for 14 days, regardless of the result, and call 1800 943 553 unless they have already been contacted by NSW Health.