A total of 3,539 new Covid-19 cases were recorded on Friday, the Department of Health said, up from 2,919 the previous day.
Prof Doyle said: "Although younger people continue to make up the greatest share of new cases, we're now starting to see worrying signs of infections occurring in the elderly, who are at far higher risk of getting seriously ill.
New Covid-19 restrictions for parts of Northern Ireland, including Belfast and Ballymena, come into force on Monday.
Spain has recorded 4,708 new coronavirus cases in 24 hours, bringing the total number of confirmed cases in the country to 566,326.
Spain is the first country in the European Union to reach half a million coronavirus cases.
French Prime Minister Jean Castex says coronavirus is "circulating more and more" in the country, but that officials want to avoid any new nationwide lockdown.
These include fast-tracking testing for priority cases, recruiting extra testers, and asking patients who have tested positive for Covid-19 to confine themselves for seven days, instead of 14.
He said it was particularly concerning that the number of hospital admissions for coronavirus has gone up for the first time in weeks.
On Thursday, the country recorded almost 10,000 new coronavirus cases in 24 hours, marking its highest single-day count since the start of the outbreak.
Leicester's Diwali celebrations - believed to be among the biggest outside of India - have been cancelled due to coronavirus restrictions.
The extension to North and South Lanarkshire means the restrictions now cover more than 1.75 million people in the west of Scotland.
Armenia has lifted its state of emergency but says some of its coronavirus restrictions will remain in place until January.
The government said it had decided to end the state of emergency, which was introduced in mid-March and extended several times, because coronavirus was spreading less quickly than before.
Armenia - which has a population of about three million people - has recorded 45,503 coronavirus cases and 909 deaths so far.
The R number is a way of rating coronavirus or any disease's ability to spread in the population.
A further 3,539 people have tested positive for coronavirus in the UK, figures released by the Department of Health and Social Care show.
It takes the total number of UK cases to 361,677.
A further six deaths have been recorded in those who had a positive coronavirus test in the last 28 days.
months since the World Health Organization declared Covid-19 a global pandemic,.
has been 26 days since any domestic cases of Covid-19 were confirmed in the.
country, and the government says that people don’t need to take any extra.
the last six months, there have been around 4,300 confirmed cases of Covid-19
The US is marking the anniversary of the 9/11 attacks amid coronavirus restrictions
But a separate 9/11 group organised an event nearby, where they said people would be allowed to recite the names while keeping a safe distance
As we've reported, a number of Conservative backbenchers have been criticising the government's new coronavirus restrictions
A new so-called "rule of six" is being introduced on Monday, limiting the number of people who can socialise together indoors or outdoors in England to six people
Sir Christopher said he was "very concerned about the lack of opportunity for people, the public first of all, to see the text of these new regulations, and I'm also concerned about the continuing reluctance of the government to give any opportunities to members to debate this"
More than 60 people have tested positive for coronavirus following a charity football match, health officials have said
A further 33 people have now contracted the virus amid an outbreak linked to the event at Burnside Working Men's Club in Fencehouses, on the border of Sunderland and County Durham
Regarding the messaging in England, to encourage people back to the office, he added: "This is not and never has been our policy in Wales."
Meeting people indoors has been at the heart of the rise in cases, he said, confirming it will be illegal from Monday to meet more than six people from an extended household indoors
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