Any figure above 1 shows that an outbreak can grow exponentially
The coronavirus reproduction number, or R value, in England has gone up and is between 0.9 and 1.2, according to the latest Government figures.
Last week, it was between 0.8 to 1.
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.
An R number between 0.9 and 1.2 means that, on average, every 10 people infected will infect between 9 and 12 other people.