Oxford University Mathematician Dr Tom Crawford explains exponential growth in the context of an epidemic such as that for COVID-19/Coronavirus. Beginning with one primary infection we see how the number of cases increases dramatically over a period of only 30 days to more than one thousand. All sources are referenced below.
The value of the reproductive number R0 = 3 is taken from current World Health Organisation estimates. Please see here for more information.
The data for the UK population is from 2018 and is sourced from Statista here.
The data for the COVID-19/Coronavirus death rate is from the Chinese Centre for Disease Control and Prevention. Please see here for more information.