from Jan 1st, which is 8 days earlier than your second link, but with only 3 points and zero comments, I'm not sure how much that counts.
The BBC story that you linked to is from Jan 3rd, the AP had a story[1] on the 5th, so the public had opportunity to know about it in early January. I can't get Reddit's search to cooperate, so I can't say if there's an earlier mention there (plus Google's dates about Reddit don't agree with Reddit's). Wikipedia has an early timeline page with a lot of details.[2] Public statements were made on December 30th about pneumonia of unknown cause.
If there had been a US pandemic response team, we could have started mobilizing December 30th. Hong Kong did.
That DW article is pretty poor, dating sars 1 to around 2009/2010 - confusing it with swine flu perhaps? A later comment, presumably from another source since the article is tagged AFP/AP/Reuters, gives a correct and more precise dating to sars 1. Yet the editor/collator didn't notice the discrepancy.
I would hope they knew about it since January because I knew about it since January and likely so did you.
And since the beginning of February I've been warning people in ever more concrete terms.
Here it was, right here on HN in January:
https://news.ycombinator.com/item?id=22146446
There may be even older ones, for instance, this one:
https://news.ycombinator.com/item?id=22000761
Which linked to:
https://www.bbc.com/news/world-asia-china-51047576
which in turn links to:
https://www.bbc.com/news/world-asia-china-50984025
Which is the oldest western article I've been able to find. Are there older ones?