EGCG = Antiviral?

"EGCG, a polyphenol present in green tea has been shown to have an antiviral activity for many viruses."
https://www.sciencedirect.com/science/article/pii/S0042682216301544

"Further research on SARS-CoV-1 and SARS-CoV-2 and GTE found that EGCG (epigallocatechin gallate) and other Catechins are able to inhibit the virus directly, even without zinc."
https://covid.us.org/2020/09/30/covid-19-and-green-tea-extract-egcg/

"Antiviral activities of EGCG with different modes of action have been demonstrated on diverse families of viruses, such as Retroviridae, Orthomyxoviridae and Flaviviridae and include important human pathogens like human immunodeficiency virus, influenza A virus and the hepatitis C virus."
https://pubmed.ncbi.nlm.nih.gov/23072320/

"Epigallocatechin-3-O-gallate (EGCG) is the major catechin component of green tea (Cameria sinensis), and is known to possess antiviral activities against a wide range of DNA viruses and RNA viruses. However, few studies have examined chemical modifications of EGCG in terms of enhanced antiviral efficacy."
https://pubmed.ncbi.nlm.nih.gov/30262731/

"The catechins in green tea have a wide range of antiviral activity against a variety of viruses that act by interfering with its replication cycle."
https://www.researchgate.net/publication/298802541_Antiviral_effects_of_green_tea_Camellia_sinensis_against_pathogenic_viruses_in_human_and_animals_a_mini-review

"In preclinical research EGCG shows broad antiviral mechanisms for an array of viruses that affect human health.3 EGCG also has the advantage of being active across a range of cells, from viral host cells to immune cells.3,4 The virus that causes COVID-19 is a positive-sense single-stranded RNA virus, which puts it in a similar classification as hepatitis C, Zika, and West Nile viruses.2,3 EGCG is known to inhibit viral entry of hepatitis C and Zika, but the effect is not known for SARS-CoV-2.3"
https://www.metagenicsinstitute.com/blogs/antiviral-green-tea-extract/

"Among the test compounds, the EGCG and ECG were found to be potent inhibitors of influenza virus replication in MDCK cell culture and this effect was observed in all influenza virus subtypes tested, including A/H1N1, A/H3N2 and B virus."
https://yonsei.pure.elsevier.com/en/publications/antiviral-effect-of-catechins-in-green-tea-on-influenza-virus

"The main antiviral effects include inhibiting the virus from binding to and entering host cells"
https://www.hindawi.com/journals/bmri/2018/9105261/