There have been more than 700,000 confirmed cases of coronavirus so far in the UK and 40,000 people have died, government figures show.
However, these figures include only people who have died within 28 days of testing positive for coronavirus and other measures suggest the number of deaths is higher.
Find out how the pandemic has affected your area and how it compares with the national average:
The government announced 16,171 confirmed cases on Saturday.
After a steady decline since the first peak in April, confirmed cases started rising again in July, with the rate of growth increasing sharply from the end of August.
On Friday, the Office for National Statistics (ONS) said that approximately one in 160 people in homes in England had coronavirus in the week ending 8 October. That equates to 336,500 people – approximately 50% higher than the figure the previous last week.
They believe there are around 27,900 new infections a day in homes in England – and that does not include outbreaks in communal residences like student halls of residence.
The Scientific Advisory Group for Emergencies (Sage) said it is “almost certain that the epidemic continues to grow exponentially across the country”.
However, cases in the community may still be lower than during the first peak as widespread testing was not available until mid-May, meaning the number of cases recorded at the time was only a fraction of the people with coronavirus.
The latest figures show hospital admission rates for Covid-19 patients rising most quickly in the North West and the North East and Yorkshire region.
With rising Covid-19 admissions, there have been warnings that hospitals will have to cut back core services.
There are several local hotspots in the UK where cases have spiked in recent weeks.
The orange areas on the map below are those currently seeing the highest number of cases per 100,000 people.
Restrictions have been tightened in many areas of the UK in recent weeks – including across the whole of Scotland and Northern Ireland, and areas of Wales.
In England, a new three-tier lockdown system has been introduced.
Liverpool City Region and Lancashire are currently in tier three, referred to as the “very high alert” category. Discussions have been taking place between the government and local leaders over whether the Greater Manchester area should also move from tier two to tier three.
London, Essex, York, Elmbridge, Barrow-in-Furness, North East Derbyshire, Erewash and Chesterfield moved into tier two on Saturday.
Prime Minister Boris Johnson said that “without action, there is no doubt that our NHS would soon be struggling to treat the sheer number of people seriously ill with Covid”.
An effort by the Welsh government to prevent the spread of infection, means people from Northern Ireland, parts of Scotland and areas of England in tiers two and three are now banned from travelling to Wales. The Welsh government is also considering a two-week lockdown for the whole country.
Northern Ireland has extended half-term and closed schools for two weeks. It has also imposed new, tighter restrictions on the hospitality sector, with pubs, restaurants, hotels, cinemas, cafes and a range of other businesses to remain to closed until at least Friday 13 November.
You can check the Covid-19 restrictions where you live here.
The government announced 150 new deaths on Saturday.
Of those deaths, 128 were in England, 15 were in Scotland, five were in Wales, and two in Northern Ireland.
Three times as many people have died from Covid-19 than from flu and pneumonia in England and Wales this year, according to official figures.
Between January and August 2020, there were 48,168 deaths due to Covid-19 compared to 13,600 from pneumonia. Only 394 were due to flu.
Rules were amended over the summer to include deaths in the coronavirus total only if they occurred within 28 days of a positive test. Previously in England, all deaths after a positive test were included.
England has seen the majority of UK deaths from Covid-19. Using the 28-day cut-off, there have been about 38,000.
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- YOUR QUESTIONS: We answer your queries
When looking at the overall death toll from coronavirus, official figures count deaths in three different ways.
Government figures count people who tested positive for coronavirus and died within 28 days.
But there are two other measures.
The first includes all deaths where coronavirus was mentioned on the death certificate, even if the person had not been tested for the virus. The most recent figures suggest there had been more than 57,000 deaths by 2 October.
The third method looks at all UK deaths over and above the number usually expected for the time of year – known as excess deaths. This measure shows the death toll was more than 65,000 by 2 October.
There were 11,444 deaths registered in the UK in the week to 2 October, according to the latest figures reported by the ONS. That is nearly 600 above the average for this time of year, and up on last week’s figures by the same amount.
It was the fourth week in a row that Covid-19 registered deaths had risen across the UK – a total of 343 involved coronavirus, up from a low of 83 on 4 September. But the total is still far below the peak of 9,495 seen in April.
The “R number” is the average number of people an infected person will pass the disease on to.
If R is below one, then the number of people contracting the disease will fall; if it is above one, the number will grow.
On Friday, the government said its estimate for the R number across the whole of the UK was 1.3-1.5.
The estimate for England is 1.2-1.4, while for Scotland it is 1.3-1.6. The estimate for Wales is 1.0-1.4 and in Northern Ireland it is 1.4-1.8.
The government has said in the past that the R number is one of the most important factors in making policy decisions.