Astodrimer (SPL7013 free base) is a large (3-4 nm, ~ 16.5 kDa), negatively charged, highly-branched dendrimer, is a potent virucidal agent. Astodrimer shows antiviral and virucidal activity against a broad spectrum of viruses, including SARS-CoV-2, HIV-1 , HSV-1 , HSV-2 , HPV. Astodrimer also has antibacterial properties.