The timeline on that first San Francisco Omicron case is out.
Monday November 22nd, before Thanksgiving, arrives at SFO from South Africa.
Thursday Nov 25, Thanksgiving, felts first symptoms.
Three days later, Nov 28th, gets test.
Monday 29th, positive result.
Tuesday 30th, sequenced by UCSF.
Also reported on the 27th, Amsterdam says two flights from South Africa carrying 600 passengers had a 10% Covid positive cases rate with 61 positive passengers. 13 of which where Omicron. Simple math says 48 had one of the other Covid variants.
In other words, flights for THANKGIVING where toxic superspreader events.
Hopefully Omicron sticks with early anecdotal reports of being mild but highly transmissible.