One in eight people on Clare Island has been infected with Covid-19.
The Irish Times reports 20 of the 160 residents of the Mayo island have tested positive for the virus, making it one of the most infected communities in the country.
A public health team travelled to the island by ferry last week to carry out tests on suspected Covid-19 cases, assisting the two public health nurses who live there.
Locals have indicated increased socialising over Christmas as the cause of the spike in infections.
The island is in the Belmullet Electoral Area, which according to latest figures has the highest incidence rate of Covid 19 in the country.