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. 2022 Mar 3;9:811176. doi: 10.3389/fmed.2022.811176

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Copyright © 2022 Zhao, Feng, Meng, Jin, Li and Li.

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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Possible models of SARS-CoV-2 infection, interactions between the human gut and lungs, and potential positive immune responses triggered by probiotics and other prebiotics against lung infection and injury (69, 70, 78–80).