I am going to post this info for those who are interested ... it is from official reports about the start of the virus.
I did post it a little earlier, but it included a not-allowed link. Just reposting with allowed links, after approval.
In late December 2019, a cluster of pneumonia cases showed up in Wuhan.
On 31st December, a public emergency was announced, a formal investigation commenced, a rapid response team was sent to Wuhan - and WHO were notified.
The virus was tested for avian flu, influenza, adenovirus, SARS, and MERS. It was none of these.
Epidemiological investigation traced the virus to Wuhan’s Huanan Seafood Wholesale Market, which then was immediately closed and disinfected. Now the hunt for anyone else who could have the virus began.
On 7th January, the virus was identified as a novel coronavirus. It is closely related to SARS and MERS, but has some distinct differences.
Early cases suggested that the coronavirus was not as severe as SARS or MERS. But then it became apparent that it is highly contagious, even more so than SARS or MERS.
On 20th January, it became a notifiable disease under Chinese Law - all cases must be reported to Infectious Diseases control.
On 23rd January, movement in and out of Wuhan was monitored and limited.
On 25th January, all sectors were put on high alert and were mobilised to respond to the
epidemic and stop the spread.
By now, the cases were being studied to determine, develop, and implement the best control strategies.
By 11th February, 72,314 cases had been studied.
44,672 cases (61.8%) were confirmed, 16,186 cases (22.4%) were suspected, 10,567 cases (14.6%) were clinically diagnosed, and 889 cases (1.2%) were asymptomatic.
A majority were aged 30–69 years (77.8%), male (51.4%), farmers or laborers (22.0%), and diagnosed in Hubei Province (74.7%). Most patients reported Wuhan-related exposures (85.8%) and were classified as mild cases (80.9%).
More data is included in the report.
Report written February 10, 2020; submitted February 14, 2020; accepted February 14, 2020
The Epidemiological Characteristics of an Outbreak of 2019 Novel Coronavirus Diseases (COVID-19) — China, 2020
Vital Surveillances: The Epidemiological Characteristics of an Outbreak of 2019 Novel Coronavirus Diseases (COVID-19) — China, 2020
Report also available at NIH National Library of Medicine:
[The epidemiological characteristics of an outbreak of 2019 novel coronavirus diseases (COVID-19) in China] - PubMed