Michael, a Chinese scientific paper about the first outbreak of Delta in mainland China:
I don’t know if it’s been peer reviewed, but note that one of the researchers is at Oxford. The outbreak was contained and thus extinguished, every case being traced back to the index case. A total of 167 local infections were identified. It is likely that far more people than that were quarantined, and I don’t know how long anywhere was locked down for; probably up to a month seeing as 30 million tests were performed. However, the government’s prompt adjustment of policy, even before the research was complete, is commendable:
“Our investigation on the quarantined subjects suggested for the Delta variant, the time window from the exposure to the detection of viruses was peaks at ~3.7 days and presented a higher infectiousness/transmission risk when the virus was first detected. In response to this notable viral parameter, the government required people leaving the Guangzhou city from airports, train stations and shuttle bus stations to show proof of a negative COVID-19 test within 72 hours on June 6 and further shorten into 48 hours on June 7, in contrast to the seven days in the 2020 epidemic.”
That’s really “following the science”, such a contrast to the empty sloganeering from Westminster.