'Prolonged, unprotected contact' led to first known person-to-person coronavirus transmission in US, study says
A woman who traveled from China to Illinois in mid-January likely transmitted the novel coronavirus to her husband through "prolonged, unprotected contact," according to research released Thursday.
None of more than 300 people who came into contact with the two patients after they showed symptoms, however, developed symptoms of their own. The findings, published in the medical journal The Lancet, detail the first known transmission of novel coronavirus in the United States, and suggest that the virus may transmit most easily through extended contact with infected people, not brief or casual exposures....
https://edition.cnn.com/2020/03/12/health/person-to-person-coronavirus-illinois-study/index.html
None of more than 300 people who came into contact with the two patients after they showed symptoms, however, developed symptoms of their own. The findings, published in the medical journal The Lancet, detail the first known transmission of novel coronavirus in the United States, and suggest that the virus may transmit most easily through extended contact with infected people, not brief or casual exposures....
https://edition.cnn.com/2020/03/12/health/person-to-person-coronavirus-illinois-study/index.html