Letter to the Editor
Retrospective search of SARS-CoV-2 in respiratory samples in Vallès Occidental (Barcelona, Spain) before the first case was reported
Búsqueda retrospectiva del SARS-CoV-2 en muestras respiratorias en el Vallès Occidental (Barcelona, España) antes de que se notificara el primer caso
Ana Blanco-Suárez
, Pepa Pérez-Jové, Nerea Escribano-Castillejo, Mónica Ballestero-Tellez
Corresponding author
Servicio de Microbiología, Catlab, Viladecavalls, Barcelona, Spain
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| 2025 12 | 33 | 3 | 36 |
| 2025 11 | 27 | 20 | 47 |
| 2025 10 | 25 | 10 | 35 |
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| 2025 8 | 16 | 9 | 25 |
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| 2025 6 | 30 | 3 | 33 |
| 2025 5 | 25 | 4 | 29 |
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| 2025 3 | 28 | 7 | 35 |
| 2025 2 | 16 | 4 | 20 |
| 2025 1 | 14 | 6 | 20 |
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| 2024 10 | 15 | 0 | 15 |
| 2024 9 | 22 | 3 | 25 |
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| 2024 7 | 15 | 6 | 21 |
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| 2024 2 | 8 | 3 | 11 |
| 2024 1 | 6 | 2 | 8 |
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| 2023 3 | 16 | 1 | 17 |
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| 2022 2 | 15 | 3 | 18 |
| 2022 1 | 12 | 2 | 14 |
| 2021 12 | 11 | 9 | 20 |
| 2021 11 | 9 | 8 | 17 |
| 2021 10 | 8 | 13 | 21 |
| 2021 9 | 10 | 5 | 15 |
| 2021 8 | 39 | 4 | 43 |
| 2021 7 | 9 | 3 | 12 |
| 2021 6 | 18 | 7 | 25 |
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