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. 2022 Jul 5;157:116725. doi: 10.1016/j.trac.2022.116725

Fig. 4.

Fig. 4

(A) Schematic diagram of the SERS based LFA strip prepared using gap enhancement nano-tags for IgM and IgG detection [76]; (B) Working principle of LFA that can test SARS-CoV-2 S protein using ACE2 receptor in test line [78]. Reproduced with permission from ref. 76–78, Elsevier Ltd.