Huge initial exposure to the back and forth travel from China. Everything from care workers, to the Chinese new year travel, to silicon forest IT exposure in the Seattle area.
“Huge initial exposure to...travel from China”
Actually, most WA cases as of a few days ago derived from the first case treated at Everett Providence Hospital, according to genetic analysis. There were not a large number of vectors.
care workers?...no possibility it was visitors????..