New precautions have become part of our daily life since COVID-19 pandemic such as wearing masks, maintaining distance and disinfecting products bought from markets before using them which is exhausting. We aimed to test the inhibitory effect of Camellia sinensis (black tea) water extracts on respiratory viruses and the inhibition of viruses accumulated over different surface types after being soaked in water supplemented with the extracts. Two water extraction methods (extract A: maceration at 80 °C for 30 min and extract B: boiling for 40 min) were applied; extracts were analyzed by high-performance liquid chromatography to detect polyphenolic compounds. Results showed that 200 μg/ml of extract A and 50 μg/ml of extract B in water caused 100% inhibition of influenza A (enveloped virus) virus after 1.5 h and similar results were obtained for adenovirus (non-enveloped virus) but at the same concentration of extract A and at 100 μg/ml of extract B. Different surfaces (aluminum, glass, plastic or carton, vegetables of smooth (tomato) or rough (lemon) surfaces and green leaves) were inoculated with both viruses for 20 min and then soaked in the water supplemented with 200 μg/ml of extract A or 100 μg/ml of extract B for 1.5 h, and this resulted in complete inhibition of both viruses.

自 COVID-19 大流行以来，新的预防措施已成为我们日常生活的一部分，例如戴口罩、保持距离以及在使用从市场购买的产品之前对其进行消毒，这令人筋疲力尽。我们旨在测试茶树的抑制作用（红茶）水提取物对呼吸道病毒的作用，以及浸泡在补充有提取物的水中后对不同表面类型积累的病毒的抑制作用。采用两种水提取方法（提取物 A：80°C 浸渍 30 分钟，提取物 B：煮沸 40 分钟）；通过高效液相色谱分析提取物以检测多酚类化合物。结果表明，水中 200 μg/ml 的提取物 A 和 50 μg/ml 的提取物 B 在 1.5 小时后对甲型流感病毒（包膜病毒）产生了 100% 的抑制作用，而腺病毒（无包膜病毒）也获得了相似的结果，但在相同浓度的提取物 A 和 100 μg/ml 的提取物 B。不同的表面（铝、玻璃、塑料或纸箱，