https://www.mercurynews.com/2020/07/10/fauci-everything-we-know-about-covid-19-so-far/

At the world’s first COVID-19 conference, a one-day gathering held virtually on Friday, Dr. Anthony Fauci summarized the latest science on the new virus. As director of the National Institutes of Allergy and Infectious Disease, he oversees the nation’s extensive research into this unique pathogen, and its impact on health.

When it started: There is evidence of person-to-person transmission “weeks before” a cluster of cases was detected at a Wuhan market in late December of 2019.