Fuente: WIPO "essential oil or extracts" A betel leaf extracts composition having bactericidal, antiviral, and neutralization of virus SARS-CoV-2 properties by oral. The bactericidal, antiviral, and SARS-CoV-2 virus-neutralizing efficacy of betel leaf extract/essential oil was increased by the combination with the one or two or more active plant extracts/essential oils ingredients, 4-allylpyrocatechol (APC) ingredient, a mixture of ginger-honey, and a mixture of lemon-kumquat-cinnamon by predefined order and predetermined percentage by weight of each ingredient into an oral cavity delivery agent including a range of gum, confectionery/candy, lozenge, tablet, edible film, oral film, oral solution and oral spray solution.