Want to be clear here: We knew this was coming. We had dress rehearsals with SARS, MERS, and H5N1. We knew what needed to be done. We just decided not to listen, and not to prepare.
This is the logical outcome.
Sorry, but I believe strongly that Reality exists and facing one's errors is critical to ensuring they don't happen again. The problem isn't that "we didn't know" the problem is people willingly choose to ignore facts.
Bingo! All these denialists are doing is adding to the problem. If more people had listened and understood how serious this was in the beginning we wouldn't be in this fucking mess
The initial release from the World Health Organization (Jan 9th 2020). Read it and weep.
TL;DR
"According to Chinese authorities, the virus in question can cause severe illness in some patients and does not transmit readily between people."
"WHO does not recommend any specific measures for travellers. WHO advises against the application of any travel or trade restrictions on China based on the information currently available."