Yes it is quite reasonable. Some years ago lab tests suggested that quercetin and EGCG in green tea move zinc into cells like hydroxychloroquine does. Zinc inhibits an enzyme needed for viral replication.
Quercetin is in the I-Mask protocol for outpatients from the med school profs at FLCCC.net.
My mid 80s parents and I used I_Mask when we got our dance with the virus. I was very impressed with its punch. My 87 yr old father never even called his doctor. more if requested.
Btw green tea seems to be a better option than coffee when sick. Coffee contains arginine that competes with the anti-viral amino acid lysine. There was a study of it for C19 patients--reference if requested.
Don't forget that Ivermectin study data is impressive. The FLCCC is recommending it with quercetin, Vit C D, melatonin, zinc.