https://en.wikipedia.org/wiki/Weiping_Zou
Weiping Zou MD Phd works at Michigan Ann Arbor Medicine Hospital researching cancer. He is from WUHAN !
Wuhan is quite a Hub: (Wiki)
Wuhan today is considered the political, economic, financial, commercial, cultural and educational center of Central China.[17] It is a major transportation hub, with dozens of railways, roads and expressways passing through the city and connecting to other major cities.[23] Because of its key role in domestic transportation, Wuhan is sometimes referred to as "the Chicago of China" by foreign sources."
Popular Transit locations make it harder to contain Coronavirus.
The two coronovirus patients in Michigan are at this same Ann Arbor Hospital and one was already an 'inpatient'. Interdasting. Both travelled recently.
https://www.wxyz.com/news/michigan-coronavirus-patient-being-treated-at-um-hospital-in-ann-arbor
2 in Michigan 2 days ago, now today it is 13.https://www.washtenaw.org/3095/COVID-19