>spread in places like the Bay Area may have started as early as January This is known for certain in Seattle. The first case was in mid-January[1], then six w

>spread in places like the Bay Area may have started as early as January This is known for certain in Seattle. The first case was in mid-January[1], then six weeks passed before the big outbreak started and genetic sequencing showed that the virus was directly descended from that original case six weeks earlier[2], indicating that there had been ongoing transmission throughout the community for the past six weeks. [1] https://www.seattletimes.com/seattle-news/health/snohomish-county-man-with-wuhan-coronavirus-had-close-contact-with-at-least-16-people-health-officials-say/ https://www.seattletimes.com/seattle-news/health/snohomish-c... [2] https://www.washingtonpost.com/health/coronavirus-may-have-spread-undetected-for-weeks-in-washington-state/2020/03/01/0f292336-5bcc-11ea-9055-5fa12981bbbf_story.html https://www.washingtonpost.com/health/coronavirus-may-have-s... ps be sure to read that first link, published in january. It's absolutely maddening how cavelier everyone was being, even while China was literally shutting down a city the size of new york and sealing off the entire province...