That's impossible, unless you're saying after the new year still means around xmas. Taiwan discovered it on Dec. 31 2019 via a Wuhan news report about several cases held in isolation. They forwarded that info to the WHO. [1]
> At 6:30 a.m. on Dec. 31, Dr. Lo at Taiwan’s CDC woke to an alert on his phone.
> His colleagues in the media monitoring unit had detected social media posts about a pneumonia of unknown cause in Wuhan. The original posts in China were quickly removed, but screenshots had been reposted on PTT, a popular online forum in Taiwan. Some commenters feared a resurgence of the Severe Acute Respiratory Syndrome (SARS), which had killed 774 people in 2002 and 2003, mostly in Asia.
https://time.com/5826025/taiwan-who-trump-coronavirus-covid1...