id author title date pages extension mime words sentences flesch summary cache txt cord-347351-emdj66vj Kampf, Günter Potential sources, modes of transmission and effectiveness of prevention measures against SARS-CoV-2 2020-09-18 .txt text/plain 10283 592 50 Originating from a single travel-associated primary case from China, the first documented chain of multiple human-to-human transmissions of SARS-CoV-2 outside of Asia allowed a detailed study of transmission events and identified several factors (e.g. cumulative face-toface contact, direct contact with secretions or body fluids of a patient, personal protective equipment) to classify contacts as low or high risk [32] . In the close surrounding of COVID-19 patients in hospitals SARS-CoV-2 RNA is detected more frequently compared to surfaces outside the patient rooms but samples were so far consistently negative for infectious virus. General disinfection of frequently touched surfaces in the public such as shopping carts or door handles is, however, unlikely to add any protective value because even in COVID-19 wards inanimate surfaces were mainly contaminated in the permanent and immediate surrounding of symptomatic patients (detection of viral RNA, not of infectious virus) and only rarely one room away [138] suggesting that the risk to find SARS-CoV-2 on frequently touched surfaces in the public is low. ./cache/cord-347351-emdj66vj.txt ./txt/cord-347351-emdj66vj.txt