Britain is looking down the barrel of a possible coronavirus second wave as cases begin to spike elsewhere in Europe.
In Spain the number of cases has shot up, forcing the UK to reimpose 14 days' quarantine on anyone who returns from there.
It's not quite the same picture in England, where as far as the figures show, there's been no huge rise.
But just as pubs, cafes, hairdressers and gyms reopen, there have been worrying local outbreaks in Oldham, Luton, Blackburn, Leicester and more.
And across England as a whole, a steady fall in the number of new cases has now "levelled off". According to one measure, the number of positive tests each day has risen 13% since the start of the month.
That will worry many people as more rules are lifted on August 1 - with people in England encouraged to go back to work, and the vulnerable no longer needing to shield.
So what do the statistics say? We look a few of the figures that will be worrying the PM - and the nation.
First, what has Boris Johnson said?
Boris Johnson said yesterday: "Clearly we now face, I'm afraid, the threat of a second wave in other parts of Europe and we just have to be vigilant and we have to be very mindful."
A Downing Street source later told the Daily Mail : "The PM is extremely concerned by what he's seeing abroad and fears we could be seeing the same thing here in a fortnight."
A No10 spokesman declined to comment today on the report in the Mail.
But asked if there could be a second wave in the UK in two weeks, Culture Secretary Oliver Dowden told BBC Breakfast: "There is always a risk. We have been clear all along that there is a risk."
Here's why they could be worried.
1. New case numbers are no longer falling in England
The number of new coronavirus cases is no longer falling in England, official figures showed on Friday.
The Office for National Statistics announced a steady decline in number of people testing positive for Covid-19 over recent months "has now levelled off".
The watchdog estimated that in the week to July 19, around one in 2,000 people in had coronavirus in the community in England. The previous week's bulletin put the figure at one in 2,300.
And there were an estimated 2,800 new cases per day, compared with 1,700 the previous week.
The ONS stopped short of saying cases actually rose - because each week's statistics "cannot be directly compared". There are also very high levels of uncertainty, because the ONS is uses a model to estimate all coronavirus cases in England - not just people who test positive.
We explain the separate data on people testing positive below.
2. The number of people testing positive each day has been slowly rising for weeks
The number of people testing positive for Covid-19 in England has been slowly creeping up for weeks.
The seven-day rolling average of new cases in England had fallen to 535 on July 1, the lowest since March.
But since then the number has gradually ticked up and hit 604 on July 21 - a rise of 13%.
The data, issued by Public Health England, could of course be due to more people getting tested for coronavirus - therefore more people testing positive.
But whatever the cause, it shows confirmed cases are certainly not levelling off below 500, and could indicate rises or outbreaks in parts of the nation.
The Daily Mail reports there has been an even higher 28% rise in new cases over a similar period.
We used Public Health England's recommended method to calculate the number of new cases per day - looking at the dates tests were taken, not the date the results came back. But both methods - ours and the Mail's - show a steady rise in confirmed cases.
For comparison, the rolling average of confirmed cases hit a peak of 4,141 on April 21.
3. Cases have surged in Oldham - and it's only one area where there are problems
Oldham, Greater Manchester, was the latest council yesterday to announce local restrictions after a coronavirus outbreak.
It followed Leicester, Luton and Blackburn, all of which have barred residents from exiting lockdown at the same speed as the rest of England.
The figures in Oldham show just how quickly the virus can spread. The council saw 119 cases in the week to 25 July - up 358% from 26 the week before.
In Blackburn, the number of new people testing positive per 100,000 residents rose from 30 to 48 to 79 over the most recent three weeks.
Over the same three-week period in Luton, the number of new positive tests per 100,000 residents rose from 17 to 28.
4. Spain has seen cases rocket
Spain has been an example to the rest of Europe of how quickly a second wave could descend from elsewhere in Europe.
The number of Covid-19 cases in Spain being reported to the European Centre for Disease Prevention and Control almost doubled last week.
The public health body registered 6,347 cases in the week to July 17 and 12,166 in the week to July 24.
While the figures can't be directly compared to the UK's - for example, they record zero Spanish cases on weekends - they were worrying enough for the UK to clamp down with new rules on quarantine.
Boris Johnson said: "Let's be absolutely clear about what's happening in Europe, amongst some of our European friends.
"I'm afraid you are starting to see in some places the signs of a second wave of the pandemic."
Spain's PM Pedro Sanchez has insisted the outbreaks are confined to particular regions, claiming "most of Spain" has case numbers lower than in the UK.
5. The virus survives better in winter
Scientific advisors to the government have warned winter - with lower temperatures, weaker sunlight and more people huddling in badly-ventilated places indoors - poses a risk of a second wave.
One paper by the New and Emerging Respiratory Virus Threats Advisory Group (NERVTAG) suggests there is a big difference between summer and winter in how long the virus can linger on surfaces.
Presented to SAGE on July 3, the paper looked at how long the virus could remain "viable" - infecting people who touch it - in summer and winter.
Although the virus itself was no more viable in each season, it lingers for longer on outdoor surfaces when it is cold.
Sunlight would take 177 minutes in midwinter to eradicate its viability to the same level as 30 minutes of sunlight in midsummer, the paper said.
At the autumn equinox, the same hit to the virus from sunlight would take 77 minutes.
