She took charge when both her parents caught the virus.
The impact of covid-19 on two frontline workers from the midlands meant their 14 year old daughter was left as their carer for five days.
Laois couple Ollie Byrne and Ailish both contracted the virus in the space of two weeks in April while working in a medical setting.
It took the pair 21 days to recover, while spending up to 18 hours a day sleeping.
Mr. Byrne says Muireann had to learn to cook for the family very quickly: