seaweed article 57 Seaweed 55 nonhuman 45 polysaccharide 35 priority journal 35 Polysaccharides 32 algae 27 unclassified drug 26 Animals 23 carrageenan 23 controlled study 22 antiviral activity 19 chemistry 19 galactan 19 Rhodophyta 18 methylation 18 Galactans 17 Humans 17 Magnetic Resonance Spectroscopy 17 Antiviral Agents 16 Anticoagulants 15 galactose 15 Carrageenan 14 Simplexvirus 14 human 14 sulfate 14 Cercopithecus aethiops 13 Methylation 13 Vero Cells 13