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(A): The SERS spectra for HAdV in different PBS concentrations (2 *104-1 *105 PFU /test). (B): The bar graph of the I1000/I923 value corresponding to the HAdV change in PBS. (C): The SERS spectra for SARS-CoV-2 in different PBS concentrations (2 *104-1 *105 PFU /test). (D): The bar graph of the I720/I923 value corresponding to the SARS-CoV-2 change in PBS.
