Conor McGregor has taken to Instagram to share that he and his family have been suffering from the Aussie flu virus which recently arrived in Ireland.
The virus has killed around 10 people this year, with a further 73 hospitalised, according to the HSE's influenza report.
Conor posted a snap of himself and his son Conor Jr relaxing and recuperating from the illness.
'Well that was a wild New Year's Eve. Half the family hit with the Australian flu virus and some even left in hospital with it,' he captioned a since-deleted Instagram post.
'I've never even been to Australia wtf.'
'One of the most intense few days I've gone thru. Big New Year's Eve party cancelled at the last minute and I am left shaking in bed the past two days.'
'll leave that with the rest of the bad behind me in 2017 and take with me the many great experiences I've had this year!'
'None greater than the birth of my son Conor Jr. and the continued support of my family, my friends and my dedicated staff through thick and thin. Thank you all and Happy new year to everyone,' he told his followers.
Following the publication of the HSE's weekly influenza report, it has been confirmed that a number of people in Ireland have lost their lives due to a particular strain of flu known as 'Aussie flu'.
The report confirms that influenza accounted for 73 hospitalisations this month: 19 of which occurred in the week ending December 17.
Commenting on the recently released data, Dr Kevin Kelleher of the HSE explained that anonymity prevents him from releasing the exact number of fatalities.
"There have been a few deaths already… under 10 people have died so far this year," he said. "I don't give specific numbers when it's less than 10 because people could be identified."
Elaborating on figures where possible, Dr Kelleher added: "There are deaths every year that happen directly as a result of the flu, which account for about 18 to 20 fatalities. On average, there are about 400 to 600 deaths a year which are associated with the flu indirectly."
The HSE has urged those in the 'high risk' demographic to avail of the vaccination, while Dr Kelleher assures the public that many cases of flu can be treated at home.
"The most important thing is that if people think they've got it is to stay at home and look after themselves. The vast majority of people – 99pc of cases – can look after themselves at home," he said.