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. 2020 Nov 13;11:604993. doi: 10.3389/fmicb.2020.604993

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Copyright © 2020 Liu, Han, Zhao, An, He, Wang, Qiu, Ding and Shang.

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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Composition of newly diagnosed HIV-1–infected cases. Blue, orange, and gray columns represent cases belonging to large clusters (≥ 10 cases), small/medium clusters (2–9 cases), and cases not in a cluster, respectively.