At midnight, Ireland became the first country in Europe to enter a second national lockdown.
Businesses right across the country have now closed, with many staying open right up until 11.59pm last night.
Closing down the country for a second time is expected to cost another 150,000 or so jobs for the next six weeks, with the Government fully restoring the Pandemic Unemployment Payment and Wage Subsidy Schemes introduced earlier this year.
And there are growing fears that high streets will remain closed in the lead up to Christmas, unless the country's 'R rate' drops to below 0.7 by early December.
So as Ireland begins 'Lockdown 2.0', we take a look at some of the most important details you need to know:
When does lockdown end?
Level Five measures are in place from today until December 1, a period of six weeks.
What is actually closed?
All non-essential retail, along with bars, restaurants, cafes, gyms, hairdressers and barbers are closed.
Schools and construction sites are allowed to remain open.
Sporting venues, including tennis and golf clubs, cannot operate.
You can see the list of essential retail here.
Do I have to stay at home?
Yes and no.
The Government is urging everyone to stay from home unless for essential reasons.
However, we are allowed to travel within 5km of our homes for exercise, or to meet up with someone from one other household, which must be done in an outdoor setting where social distancing can be maintained.
What's happening with fines?
Refusing to wear a face mask in shops and on public transport will see fines of €500 issued.
On the spot fines up to €500 will also be handed out to people who flout the travel restrictions.
Those who throw house parties can face a €1,000 fine on their first offence or be put behind bars for a month.
It’s understood the fines will increase on the second offence to €1,500 and the homeowner could face a three month stint in jail.
The fine increases to €2,500 if caught a third time.
When will we know if lockdown is working?
NPHET's Professor Philip Nolan has said that we should know if new measures are working in around three weeks time.
He urged people not to get bogged down by daily case figures for the next couple of weeks, outlining that they will fluctuate for a period.
He told RTE's Morning Ireland: "I lot depends on how people have been behaving over the last week or 10 days.
"People realise there's a problem, people will have pulled back. If that's happened, we might see cases top out sooner, within a week.
"On the other hand if people have been mixing as normal or even accelerating their mixing in anticipation of these restrictions, it could be two weeks before cases top out, at perhaps several hundred more than we're seeing now, and then begin to decline...
"I think we need to stick with this, again to think back to where we were in April and May, we were very careful as a population...we need to go back there.
"We should see signs in three weeks."
What happens next?
If Ireland's 'R rate' drops below one, it is likely restrictions will be eased.
However, it was confirmed on Tuesday that in order for many sectors to reopen, the country needs a 'R rate' lower than 0.7.
