Assessment of Reliability is subject to scrutiny. Countries should have immediately prevented flights from China entering their countries. Bill Gates has warned everybody in more than one instance
Plenty of links (including one from the WHO), the list goes on, all indirect evidence. Of course preparation was somewhat underway but wasn't fast enough, because everyone had their own perception on the matter.
More Than 7,700 Cases of Coronavirus Recorded Worldwide (Published 2020)
Chinese officials have confirmed over 7,700 cases of the mysterious illness as foreign governments airlifted their citizens out of Wuhan, the outbreak’s epicenter.www.nytimes.com
Coronavirus: Death toll rises as virus spreads to every Chinese region
The death toll now stands at 170, with more than 7,700 cases confirmed in China.www.bbc.com
Novel Coronavirus - Information bulletin (30 January 2020) - China
Situation Report in English on China and 1 other country about Health and Epidemic; published on 30 Jan 2020 by IFRCreliefweb.int
So from your own propaganda. As of Jan 23rd, WHO says it isn't a problem and on Jan 30th they are going to meet and talk about it
Meanwhile, Trump imposes a travel ban from China the very next day and is slammed by the media for doing it. Also, don't you find it interesting that the very same people the praise our dedicated, non-partisan, loyal public servants like Lt Col Vindman in the same breadth blame the FDA and CDC from dropping the ball???