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. 2021 Aug 2;203:111831. doi: 10.1016/j.envres.2021.111831

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© 2022 The Authors

Since January 2020 Elsevier has created a COVID-19 resource centre with free information in English and Mandarin on the novel coronavirus COVID-19. The COVID-19 resource centre is hosted on Elsevier Connect, the company's public news and information website. Elsevier hereby grants permission to make all its COVID-19-related research that is available on the COVID-19 resource centre - including this research content - immediately available in PubMed Central and other publicly funded repositories, such as the WHO COVID database with rights for unrestricted research re-use and analyses in any form or by any means with acknowledgement of the original source. These permissions are granted for free by Elsevier for as long as the COVID-19 resource centre remains active.

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Fig. 1 — Recovery yields of SARS-CoV-2, PEDV, and E229 on artificially contaminated glass (panel A), steel (panel B) and plastic (panel C) surfaces (4 cm²). Tested procedures compared two swabbing methods (Method A based on ISO 15216:1 standard norm vs Method B based on commercial specimen collection swab) and two RNA extraction techniques (MN based on manual column assisted extraction vs MAX semi-automated extraction). For each surface, boxes with the same letter show differences not statistically significant (p-value < 0.05, Tukey HSD test).