Substantial undocumented infection facilitates the rapid dissemination of novel coronavirus (SARS-CoV2) | Science
▻https://science.sciencemag.org/content/early/2020/03/13/science.abb3221.full
Per person, the transmission rate of undocumented infections was 55% of documented infections ([46%–62%]), yet, due to their greater numbers, undocumented infections were the infection source for 79% of documented cases. These findings explain the rapid geographic spread of SARS-CoV2 and indicate containment of this virus will be particularly challenging.
