A teenage boy has tested positive for COVID-19 in Tasmania, becoming the state's first case in 58 days.

The teenager flew into Launceston, in the state's north, from Melbourne on Friday, October 1 when he travelled to quarantine at a family home, before taking a routine COVID-19 test.

Public Health director Mark Veitch said the teenager had been wearing a mask since he arrived at Melbourne Airport and until he left Launceston Airport.

He is currently in isolation and his family close contacts have been placed into quarantine.

Virgin Australia flight VA1364, which arrived at Launceston Airport around 11:30am on Friday, has been declared an exposure site.

All 10 passengers on the flight have been declared close contacts and have been directed to quarantine.

A small number of biosecurity and security staff have also been identified as casual contacts and placed into quarantine until they can be tested.

Public Health authorities say the risk to others at the Launceston Airport is low, but have declared the airport's arrivals hall and baggage pickup as an exposure site on Friday between 11:30am and 12:30pm.

Public Health says anyone who was in these areas of the airport during that period are considered casual contacts and must isolate immediately and contact the Public Health hotline after 8:00am on Sunday October 3. 

Further updates on the case are expected to be provided on Sunday.

The last case the state recorded was on August 2, when a traveller flew to Launceston from Sydney via Melbourne without the required border pass.

The 31-year-old man was taken straight to hotel quarantine and took a COVID test the next day.

He then flew back to Sydney on August 4 before he received his positive result.

Tasmania has recorded 234 cases of COVID-19 and 13 deaths since the pandemic began.

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