When China announced plans to lock down Wuhan and most of the surrounding Hubei province, the news was greeted with astonishment around the world. Experts warned that it was an unprecedented and risky attempt to control the virus that might not work.
Nearly two months later, with the daily number of new cases in China down to single digits last week, Wuhan is starting to emerge from two months of isolation, and this approach has become the model for other countries with outbreaks that appear to be sliding out of control.
Now there is speculation the British government is preparing to implement something similar in London, the centre of the coronavirus outbreak in Britain.
Other countries appear to have suppressed or contained the disease without such stringent measures, including Taiwan and Singapore, but they acted early and fast on other measures including testing, contact tracing and social distancing.
On 23 January China locked down Wuhan city, home to 11 million people, where Covid-19 is thought to have originated. It was probably the most extreme lockdown so far and at the time it was brought in the move was met with some international scepticism, including from the World Health Organization.
No journeys were allowed in or out of the city, even for those with compelling medical or humanitarian reasons.
Inside the city, public transport was suspended and private cars barred from the roads in most circumstances, except as part of the fight against the virus.