More than 135,000 people will be isolating at home this Christmas due to Covid-19, with close to 50,000 of them confined to their bedrooms.
The HSE advises anyone who has tested positive for Covid-19 to self-isolate in their room for at least 10 days.
This means anyone who contracted the virus from December 16 must isolate on Christmas Day.
As part of the new restrictions that were announced last Friday, all close contacts must isolate for at least five days.
Close contacts who have received a booster vaccine must isolate in their home for five days after receiving a close contact message from the HSE.
If they develop symptoms of Covid-19 or receive a positive antigen test and live with other people, they must then isolate in their room.
Close contacts who have not yet received a booster vaccine, or any vaccine, must stay at home for 10 days from when they get a message from the HSE.