The UK's R number has increased slightly to between 0.6 and 0.9, according to the latest official data.
This week's R rate - or reproduction number - has changed slightly from last week's, which scientists estimated was between 0.6 and 0.8. All school and college pupils returned to classrooms on Monday last week.
R represents the average number of people each COVID-19 positive person goes on to infect.
When the figure is above 1, an outbreak can grow exponentially, but when it is below 1, it means the epidemic is shrinking. The current figure means that, on average, every 10 people will infect between six and nine other people.
The latest growth rate is between -6% and -3%, meaning the number of infections is shrinking by between 3% and 6% every day.
It comes after the number of people infected with coronavirus continues to fall across England, according to the Office for National Statistics.
Around one in 340 people in private households in England had COVID-19 in the week to 13 March - roughly 160,200 people.
That is down from around one in 270, or 200,600 people, the previous week.
It is the lowest figure since the week to 24 September last year, when the estimate was at one in 470, or 116,600 people and it means the longer term trend of infections is levelling off and slowly coming down.
In Wales, 1 in 430 people had coronavirus this week. Last week it was 365.
In Northern Ireland, the figures are 1 in 315 - a slight drop on the 1 in 310 of last week. And the latest figures for Scotland show to the week ending 13 March, 1 in 275 people were infected - up from 1 in 320.