Watch: COVID-19: Epicentre moves from London to North West and more older people being hospitalised, UKHSA report says
The epicentre of the current COVID outbreak has moved from London to the North West of England and more older people are being admitted to hospital, new data reveals.
The UK Health Security Agency's (UKHSA) latest surveillance report also shows that the uptake of booster jabs is slowing in every age group.
Rates in the over-70s have almost levelled off at around 90%, while only a quarter of those under 30 have had the top-up jab.
It is not clear whether this is because of Christmas or if it is the start of a new trend.
Separate figures from NHS England show that fewer than half of all adults in some of the biggest cities have received a third dose. Locations include Liverpool, Birmingham, Manchester and Nottingham.
There has been a steep rise in the number of over-85s being admitted to hospital - something that will concern NHS bosses.
Hospitalisations in that age group doubled from 62 in every 100,00 in the week leading up to Christmas to 121 in every 100,000 a week later.
Rates were also up sharply in the 75-84s, rising from 28 to 57 per 100,000.
Rates in younger people were lower and rising more slowly.
The figures suggest the surge, which began in young people, has moved up the generations to affect those more vulnerable to serious disease.
The whole of the North West is reporting high numbers of infections, including the Lake District and the area immediately south of there, containing Liverpool and Greater Manchester.
There are also lots of cases in parts of the North East and in northeast London.
Lincolnshire and much of East Anglia are faring well in comparison, as are South Wales and most of the south of England.
The worst-affected areas in London are the south and the east.
The UKHSA has also released data looking at the number of people who have been re-infected.
In week ending 2 January, it said there were "59,783 possible reinfections identified in provisional figures".
The UKHSA's latest report looks at flu as well. "Laboratory indicators suggest that influenza activity is very low," it said.