CAD and COVID-19: As SARS-CoV-2 is highly infectious and pathogenic, we used a SARS-CoV-2 pseudovirus (COV-PS02, Creative Diagnostics) to investigate whether fucoidan or the CPs of seaweeds and abalone viscera could inhibit host cell infiltration, through interaction with the COVID-19 spike glycoprotein and the ACE2 receptor of the host cell in vitro.