There were no new cases recorded in the 24 hours to 8pm last night, but the community has been reminded by the Illawarra Shoalhaven Local Health District (ISLHD) to remain vigilant for symptoms.

One new COVID case was recorded in the Shoalhaven in Sunday's update.

The ISLHD confirmed it is located in the 2540 postcode with investigations to the source of infection ongoing.

Case numbers remain low and steady across the district, with two residents in the Wollongong local government area testing positive to the virus overnight.

There have been 2,534 cases of COVID-19 in the ISLHD since June.

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Meantime, NSW has recorded 150 new COVID cases and no COVID-related deaths in Monday's update.

The state's population aged 16 years and over is now 92.4 per cent fully vaccinated, while 94.5 per cent have had their first COVID-19 vaccine shot.

Those aged between 12 and 15 years are 76.5 per cent fully vaccinated, while 81.3 per cent have had their first dose.

Genomic testing has confirmed two overseas travellers who arrived in Sydney from southern Africa have been infected with the new Omicron COVID-19 variant.

Both passengers were asymptomatic when they arrived on Saturday night and are in isolation in the Special Health Accommodation.

Both are fully vaccinated.

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The ISLHD has advised the community of new rules for returning travellers regarding the Omicron B.1.1.529 variant, which authorities have labelled a "variant of concern".

All travellers arriving in NSW who have been in South Africa, Lesotho, Botswana, Zimbabwe, Mozambique, Namibia, Eswatini, Malawi, and the Seychelles during the 14-day period before their arrival in NSW must enter hotel quarantine for 14 days, regardless of their vaccination status.

All travellers who have been in any other overseas country during the 14 day period before their arrival in NSW must travel directly to their place of residence or accommodation and isolate for 72 hours, pending further health advice.

The ISLHD is encouraging the community to continue to come forward for the COVID vaccine, as well as booster shots.

The local health district's vaccination clinics, local general practitioners and pharmacies are now offering a booster dose of the Pfizer vaccine to people aged 18 years and older, six months after their second dose.

NSW Health will continue to contact people diagnosed with COVID-19 and their close contacts, and all people who need to follow specific health advice.

Residents are also alerted of exposure sites through the NSW Service app.

For a list of COVID-19 testing sites across the Illawarra Shoalhaven, visit the local health district's website.

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