The Department of Health says 70 percent of patients in ICU have not been fully vaccinated.
Intensive Care units around the country are treating people as young as 17 years old who are sick with Covid-19.
402 people are currently in hospital with the virus, 73 of whom are in intensive care.
The age of patients in ICU, in a recent surge of Covid admissions, ranges from 17 to 88 years old.
The Department of Health says 70 percent of patients in ICU have not been fully vaccinated.
Dr Catherine Motherway, Intensive Care consultant at University Hospital Limerick, says they're seeing a high proportion of unvaccinated people in ICU