For those interested in leads on prevention of coronavirus diseases, here are some conclusions of a study published by the National Center for Biotechnology Information. 

• “EGCG is an abundant tea polyphenol in brewed green tea, and many reports provide evidence that EGCG can efficiently block 3CL protease, an essential enzyme for coronavirus replication.”
•  “Moreover, additional coronavirus targets of EGCG such as RdRp and spike protein have been proposed.”
•  “Finally, EGCG treatment interferes with the replication of coronaviruses in cell culture systems.”

Consult the full study here.