id author title date pages extension mime words sentences flesch summary cache txt cord-324405-6uanhe2p Burke, Rachel M. Enhanced contact investigations for nine early travel-related cases of SARS-CoV-2 in the United States 2020-09-02 .txt text/plain 6616 242 41 To interrupt transmission and facilitate early identification of secondary cases (i.e., transmissions of SARS-CoV-2 from the original travel-related case patient to a close contact), public health authorities at the state, county, and local levels, in consultation with subject-matter experts from the U.S. Centers for Disease Control and Prevention (CDC), mobilized rapidly to place the patients under appropriate isolation and identify contacts exposed to these patients. To understand the prevalence of asymptomatic or pre-symptomatic infection, a convenience sample of actively monitored close contacts was selected from whom to request respiratory (nasopharyngeal [NP] and oropharyngeal [OP]) samples outside of diagnostic specimen collection procedures (i.e., while contacts were asymptomatic or, in some cases, symptomatic with � 1 previous negative SARS-CoV-2 result); some sites were able to request at least one set of samples from all close contacts, but most sites targeted sample collection mainly to close contacts determined to have had high-risk exposures, such as household members and some healthcare personnel. ./cache/cord-324405-6uanhe2p.txt ./txt/cord-324405-6uanhe2p.txt