The Scottish football season would be "very difficult" to complete if just one club was affected by the coronavirus.
SPFL boss Neil Doncaster issued the update following discussions between football's joint response group and the Scottish Government.
They said that they would "endeavour to complete the season and fulfil their obligations under their broadcasting agreements" but warned that a change in circumstances could see the campaign under threat.
Doncaster said: "We are taking a pragmatic approach to the current situation and have alerted our members to the fact that, if the outbreak affects the first team of even one SPFL club, it could make completing the SPFL season very difficult, so first-team players and staff should be extremely vigilant.
"Whilst the current, clear advice is that matches should proceed as scheduled, we will obviously prepare for contingencies where matches might have to be played behind closed doors, or even be cancelled, as we have already seen with other major sporting events.
"With that in mind, we have alerted the Scottish Government to the dire financial consequences facing clubs if the current situation changes and clubs are unable to generate revenue from ticket sales."
The total number of confirmed cases of coronavirus in Scotland has today risen to six.
Edinburgh Live reported earlier this week how handshakes before and after matches have been suspended with immediate effect.
SFA chief executive Ian Maxwell said they have written to clubs to "underline that we will do everything possible to complete fixtures, whilst taking fully on-board the government's expert advice and the guidance of our medical consultant, Dr John MacLean".
He added: "We have also advised our clubs of the absolute necessity of following hygiene best practice at stadiums, training grounds and other premises, as well as providing information to staff, fans, contractors, broadcasters and other media entering club premises.”
