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. 2021 Jun 10;13(6):1116. doi: 10.3390/v13061116

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© 2021 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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Representation of the studied SARS-CoV-2 in the 59-individual cluster in the diverse environments (at home, factory, two distinct family gatherings and external events). Date of diagnosis is represented in the lateral bar. The code of colours mean: in yellow individuals infected by the 20B+A3660G+T11194C viral haplotype; in gold the 20B haplotype; in blue the 20A+G24077T haplotype; in grey the symptomatic individuals, not sequenced; in green the not-infected/asymptomatic; the red outline indicates the individuals who went to Italy. Besides the family and factory, other close contacts were established based on the epidemiological survey: friends of P1 (P35–P36–P37); family of the girlfriend of P22 (P33–P34); family of a friend of P21 (P31–P32); other family members of P29 (P38–P39).