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. 2020 Jun 2;165:112349. doi: 10.1016/j.bios.2020.112349

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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 — Schematic diagram of current diagnostic methods and potential portable biosensors for COVID-19. (A) A human being infected with SARS-CoV-2. (B) Sampling from suspected cases or patients and common specimens. (C) Biomarkers and other biochemical indicators for diagnosis of COVID-19. (D) Current detection methods to corresponding biomarkers or indicators. (E) Potential ultrasensitive biosensors, especially EC biosensor and SERS-based biosensors, for virus antigens detection.