More than 10 Sydney Swans players are understood to have tested positive for the COVID-19 virus.

All Sydney players are vaccinated and have been following the state's directions since testing positive, with the Omicron variant continuing to wreak havoc on the nation.

AFL players have spent time away from their respective clubs in recent weeks for the Christmas break prior to returning to pre-season training early next year.

The Swans' 2021 training regime concluded last Wednesday, with the club having since released a statement on the recent breakout - which is the biggest the AFL has faced since the beginning of the pandemic.

MELBOURNE, AUSTRALIA - MAY 08: Swans assistant coach Dean Cox talks to his players during the round eight AFL match between the Melbourne Demons and the Sydney Swans at Melbourne Cricket Ground on May 08, 2021 in Melbourne, Australia. (Photo by Quinn Rooney/Getty Images)

"The Sydney Swans can confirm some members of the football department, including players, have tested positive for Covid-19 during their leave period," a club statement reads.

"All affected players and staff are double vaccinated and all report to be in good health.

"The Club’s primary concern is for the health and safety of all players, staff and their families.

"All positive cases are adhering to relevant State Government health directives.

"All members of the football program returned negative Covid tests before their final training session of the year on Wednesday, December 15, in line with AFL protocols that includes weekly PCR testing, as well as regular rapid antigen testing.

"Football department staff and players are due to return from leave on Thursday January 6, 2022."

7 News' Mitch Cleary has reported that at least 10 Swans players had contracted the virus.

The news comes on a day where New South Wales confirmed a record 3,057 new COVID cases.