According to the study: To make the study blind, the placebo syrup had an identical appearance and taste and was supplied in the same type of bottles. The plac

According to the study: To make the study blind, the placebo syrup had an identical appearance and taste and was supplied in the same type of bottles. The placebo syrup did not contain the elderberry extract, but was otherwise identical. Both syrups were produced and supplied by Razei Bar Ltd (Jerusalem, Israel).