One of two prison officers attached to Cork Prison who was diagnosed with Covid-19 has been discharged from hospital.
The two officers tested positive for the infection in the past two weeks.
According to prison sources, at least seven prison officers across the country have also tested positive.
There has been no confirmed case among the prisoner population at the prison on Rathmore Rd.
No inmate in any of the other prisons have tested positive either. However, some inmates have had to isolate after showing symptoms.
A number of prison officers at Cork Prison have also had to isolate because of being in close contact with the two officers who tested positive.
Efforts are being made throughout the prison system to free up space to allow for the isolation of inmates in case of an outbreak among the prison population.
Yesterday, there were 105 inmates on temporary release from Cork Prison. There were 264 in the prison itself, which has a bed capacity for 296.
According to the Irish Prison Service, the body is ensuring that at all times, up-to-date public health advice is being followed by all staff, ensuring the need to self-isolate where appropriate.
There are close to 3,500 staff working with the Irish Prison Service across its entire estate.