Tested/reported cases does not equal actual cases...”community spread” has been happening for 2 weeks now. USA has not been doing widespread testing so the “in-the-wild” number of cases is unknown. Did you see this thread?:
http://www.freerepublic.com/focus/f-news/3824053/posts
But estimates do not equal verifiable actual cases, which tested/reported cases do, though many more surely exist.