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A brief overview of the geometrical location of the four target regions (A) 459–470, (B) 527–541, (C) 987–1001 and (D) 1021–1035, on the 3D model of the trimeric structure of spike protein. The target regions have been highlighted in green. (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article.)
