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. 2021 Mar 16;12:646679. doi: 10.3389/fmicb.2021.646679

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Copyright © 2021 Trunfio, Longo, Alladio, Venuti, Cerutti, Ghisetti, Bonora, Di Perri and Calcagno.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Comparison between swab-confirmed plus symptom-based likely COVID-19 secondary cases of index cases with high vs. low viral load: hospital admissions (A) and deaths (B).