Significant inactivation of sars-cov-2 in vitro by a green tea catechin, a catechin-derivative, and black tea galloylated theaflavins - Ohgitani, E; Shin-Ya, M; Ichitani, M; Kobayashi, M; Takihara, T; Kawamoto, M; Kinugasa, H; Mazda, O (Molecules, 2021)