Racegoers are being urged to stay away from next week's Cheltenham Festival if they are experiencing symptoms associated with coronavirus, have travelled through high-risk countries or been in contact with anyone who has.
A public health notice has been added to the track's latest update on the British Horseracing Authority's administration site.
It reads: "Do not travel to the Festival if: - You have any of the following symptoms - a cough, a high temperature or shortness of breath AND - You have been to or transited through the high-risk countries, or been in contact with anyone that has, in the last 14 days.
"To protect yourself and others please do not travel and call NHS 111 (GB) or HSE 112 (Republic of Ireland) for expert advice.
"These measures are being taken in order for us to safeguard everyone's health and wellbeing during the current public health situation.
"Thank you for your understanding. For more details, please visit gov.uk/coronavirus."
The Betfair market surrounding the possibility of the Festival not going ahead on 10 March has attracted plenty of attention, with almost €3m traded by 2.30pm on Thursday.
At that time, the fixture was trading at 1.38 to go ahead, implying a 72.46% chance.
A percentage of those backing the 'no' side of the market will have done so as a hedge against Festival expenses that they have already incurred, such as transport and accommodation costs.
The firm has also opened a market on the likelihood of next month's Grand National taking place, with a small amount traded so far favouring the meeting being called off.
UK Health Secretary Matt Hancock has played down the prospect of cancelling "large events".
Speaking at the British Chambers of Commerce conference in London, Hancock said: "The science on large events is that now there is no material clinical benefit, epidemiological benefit, to cancelling events, so long as people undertake the public health measures that I'm sure you all have heard of - wash your hands and, if you have a cough or sneeze, catch it."
