Covid-19: One-in-four cases in the south had no clear source of transmission

The report said "outbreaks occurred most commonly in private houses".

The Irish Medical Journal report said the number of healthcare workers in the south with Covid-19 was lower than the national average. File Picture.

Covid-19 had a "devastating and disproportionate impact" on older age groups in the south of the country, but the number of healthcare workers affected was lower than the national average and one-quarter of cases did not have a clear source of transmission identified.

The findings are included in a new analysis of the first three months of the pandemic HSE South, which covers Cork and Kerry, published in the Irish Medical Journal.