56 cases of COVID-19 were linked to a man who did not restrict his movements after returning from abroad, health officials have said.
A report from the Department of Public Health in the Mid-West region says the outbreak affected up to 10 households and a sports team.
Health officials have detailed how the outbreak happened, altering key details to protect people's identity.
The 'index case' was abroad on holidays, but did not restrict his movements when he returned home.
He had 'mild symptoms' of COVID-19, including a runny nose and mild sore throat.
However, he checked his temperature and it was normal.
The report explained: "He felt reassured by this and socialised with a group of friends.
"He later tested positive for COVID-19. However, by this stage, he had already infected a number of his friends.
"Three of these friends went on to infect their families."
The man is also said to have a close extended family who visit each other's homes regularly, and several family members got infected.
The report explains: "One of his extended family members who had no symptoms played a match with his local team and a number of his teammates were infected as a result.
"The team members then went on to infect a number of people."
Meanwhile, a friend of the man at the centre of the outbreak felt unwell and contacted her GP to arrange a coronavirus test.
After taking the test in the morning, she 'felt a bit better' by the afternoon and went to a friend's party.
However, she received a positive test after the party - and ultimately infected a number of other people who attended.
Last month, health officials detailed how a couple socialising over a weekend was linked to 30 cases.