“…Of these, severe acute respiratory syndrome coronavirus (SARS-CoV-2) (Lang et al, 2011), dengue (Chen et al, 1997), human papillomavirus (Giroglou et al, 2001), hepatitis B (Schulze et al, 2007), herpes simplex virus (Spear et al, 1992), human immunodeficiency virus (Connell and Lortat-Jacob, 2013), and others, target heparan sulfate (HS), a highly negatively charged linear polysaccharide present on the surface of all mammalian cells (Esko and Selleck, 2002). Infection by SARS-CoV-2, the causative agent of COVID-19, can be blocked with the HS derivative heparin (Kim et al, 2020;Mycroft-West et al, 2020;Clausen and Sandoval et al, 2020). SARS-CoV-2 attachment and infection requires binding to both HS and angiotensin converting enzyme 2 (ACE2) via distinct regions of the receptor binding domain (RBD) (Clausen and Sandoval et al, 2020).…”