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Antiviral activity of tripeptides against SARS-CoV-2. (A) co-treatment; (B) virus pre-treatment; (C) cell pre-treatment; (D) post-treatment. CTRL+ refers to positive control (ivermectin 12 μM) and CTRL—indicates the negative control (only infected cells); **** p ≤ 0.0001; ns: non-significant.
