cytomegalovirus Antiviral Agents 2 Chemical Fractionation 2 HCMV 2 HIV 2 HSV 2 Herpesvirus 1, Human 2 Microbial Sensitivity Tests 2 Polysaccharides 2 Seaweed 2 Support, Non-U.S. Gov't 2 Virus Replication 2 animal cell 2 antiviral 2 antiviral activity 2 antivirus agent 2 article 2 concentration response 2 drug cytotoxicity 2 drug isolation 2 herpes simplex virus 1 2 human 2 human cell 2 human immunodeficiency virus 1 2 human immunodeficiency virus 2 2 human immunodeficiency virus infection 2 influenza virus 2 influenza virus a 2 influenza virus b 2 junin virus 2