Yikes that is a big number. So either we got lucky, we had divine protection, it hadn't spread enough, or worse we're not catching the cases.
The 3000 would have been from all over China, not just Wuhan. And even the odds if they were from Wuhan that they were infected would be small.
Now, not so much, and I fully support the air travel bans and quarantining.
When was the first case reported in the bay area?
Health Officials Confirm 2nd, 3rd, 4th Cases of Coronavirus in Bay Area and Neighboring County