Possible coronavirus hot spots have been detected across the UK as experts predict infection levels could soon peak following the lockdown almost three weeks ago.
Areas hardest-hit by the virus can be discovered by calculating how many confirmed cases of coronavirus have been reported per 100,000 of the population.
However, these figures should be treated with caution.
Not everybody infected by the virus is being tested, so it is not possible to be sure of the precise geographic spread of the disease.
The amount of testing also varies from place to place.
Some areas will rank higher than others simply because they are carrying out more tests and therefore detecting more cases.
There is also a delay in the processing and reporting of test results.
Current figures show the area with the highest concentration of coronavirus cases is Newport in Wales, which had reported around 286 cases per 100,000 population as of April 7.
Newport is one of only five areas of the UK with at least 200 confirmed cases of coronavirus per 100,000.
The other four are all in London: Brent (248 cases per 100,000), Southwark (224), Lambeth (214) and Harrow (200).
Along with Newport, other areas of south Wales are reporting some of the highest levels of prevalence in the country, such as Cardiff (198 cases per 100,000), Torfaen (188) and Blaenau Gwent (174).
Dr Frank Atherton, the chief medical officer for Wales, suggested last month that the high number of cases in these areas could be partly to do with increased testing by the Aneurin Bevan University Health Board, which is responsible for this part of the country.
He also noted that “being on the border with England is an issue”, as “we know that the hotspot in the UK is around London”, which has direct rail links to the area.
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No area of mainland Scotland has yet reached similar levels of prevalence to Wales or London.
On the Scottish mainland, the area covered by the Borders NHS health board has the highest prevalence of the virus with 129 cases per 100,000 people, followed by Tayside (124) and Dumfries & Galloway (102).
Shetland has 42 confirmed cases as of April 7, among a population of 23,000 – equivalent to 183 cases per 100,000 people.
The infection rate is also lower in Northern Ireland, with Belfast recording the highest number (116 cases per 100,000), followed by Lisburn & Castlereagh (99) and Ards & North Down (65).
As of April 7, the highest infection rate outside London is in Cumbria (161 cases per 100,000), followed by Sheffield (152) and Walsall (136).
But these levels could be attributed by the volume of testing in these parts of the country – particularly in Sheffield, where the council has acknowledged there is more testing taking place than in other areas.