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Francisco Jr, Ronaldo da Silva; Benites, L. Felipe; Lamarca, Alessandra P.; de Almeida, Luiz G.P.; Hansen, Alana Witt; Gularte, Juliana Schons; Demoliner, Meriane; Gerber, Alexandra L.; de C Guimarães, Ana Paula; Antunes, Ana Karolina Eisen; Heldt, Fagner Henrique; Mallmann, Larissa; Hermann, Bruna; Ziulkoski, Ana Luiza; Goes, Vyctoria; Schallenberger, Karoline; Fillipi, Micheli; Pereira, Francini; Weber, Matheus Nunes; de Almeida, Paula Rodrigues; Fleck, Juliane Deise; Vasconcelos, Ana Tereza R.; Spilki, Fernando Rosado
Virus research, 04/2021, Volume: 296Journal Article
•The novel variant B.1.1.28 (E484 K) previously described in Rio de Janeiro is currently spread across the southernmost state of Brazil.•The novel variant VUI-NP13L was also identified by causing a local outbreak in Rio Grande do Sul.•B.1.1.28 (E484K) is able to establish successful coinfection events co-occurring simultaneously with different lineages of SARS-CoV-2. Emergence of novel SARS-CoV-2 lineages are under the spotlight of the media, scientific community and governments. Recent reports of novel variants in the United Kingdom, South Africa and Brazil (B.1.1.28-E484K) have raised intense interest because of a possible higher transmission rate or resistance to the novel vaccines. Nevertheless, the spread of B.1.1.28 (E484K) and other variants in Brazil is still unknown. In this work, we investigated the population structure and genomic complexity of SARS-CoV-2 in Rio Grande do Sul, the southernmost state in Brazil. Most samples sequenced belonged to the B.1.1.28 (E484K) lineage, demonstrating its widespread dispersion. We were the first to identify two independent events of co-infection caused by the occurrence of B.1.1.28 (E484K) with either B.1.1.248 or B.1.91 lineages. Also, clustering analysis revealed the occurrence of a novel cluster of samples circulating in the state (named VUI-NP13L) characterized by 12 lineage-defining mutations. In light of the evidence for E484K dispersion, co-infection and emergence of VUI-NP13 L in Rio Grande do Sul, we reaffirm the importance of establishing strict and effective social distancing measures to counter the spread of potentially more hazardous SARS-CoV-2 strains.
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