Scottish Premiership stars will now be required to take daily Covid-19 tests to battle a surge in cases.
Scottish football's Joint Response Group has introduced "enhanced protocols" after First Minister Nicola Sturgeon expressed further concern at the rapid spread of the Omicron variant on Friday.
Top-flight clubs Dundee United and St Mirren have been struck by outbreaks this week - but their respective next matches against Rangers and Celtic are expected to go ahead.
Livingston boss David Martindale has called for a "circuit breaker" but his Hearts counterpart Robbie Neilson disagreed, insisting fans "need" the game to continue.
On Friday, Celtic manager Ange Postecoglou admitted he's inclined for games to continue until authorities decide otherwise.
Either way, clubs have committed to tighter measures in an attempt to minimise disruption.
A JRG statement said: "In light of the First Minister’s update today during which she expressed 'profound concern' regarding the acceleration of the Omicron variant throughout society, the Joint Response Group has implemented enhanced protocols to combat the spread of the COVID-19 virus within Scottish football.
"From Monday, testing provision will be increased among cinch Premiership clubs until the scheduled winter break commencing January 3 and will be reviewed prior to the resumption of the fixture calendar in the New Year.
"Clubs in the cinch Premiership will now be required to undertake daily testing for all playing and team staff as part of the enhanced protocols.
"Further consultation has been scheduled early next week with the Scottish Women’s Premier League, cinch Championship, League 1 and 2, and Scottish Highland and Lowland Football Leagues. The outcome of those discussions will be communicated thereafter.
"In addition, all clubs are advised to demonstrate enhanced vigilance with public health guidance, including physical distancing, wearing of face coverings while indoors, and to reiterate the importance of hand sanitising regularly.
"The JRG has also been in touch with Scottish Government to offer football stadia for use as vaccine centres to help the collective effort to roll-out the vaccine booster programme.
"We are grateful to the clubs for their collective endorsement of these enhanced measures and for the ongoing commitment to achieving full vaccination and booster vaccinations for their playing staff and team staff."
SPFL chief-executive Neil Doncaster was "pleased" clubs were on board with enhanced measures.
He said: “The First Minister has today again outlined the reality of the Omicron variant in Scotland and I am pleased with the rapid response of our cinch Premiership clubs in committing to enhanced protocols.
“We will continue to encourage compliance with the Scottish Government public health guidance and play our part in suppressing and eradicating the latest variant of this ongoing pandemic.”
