The severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is transmitted from person-to-person by close contact, small aerosol respiratory droplets and potentially via contact with contaminated surfaces. Here, we investigated the effectiveness of commercial UVC-LED disinfection boxes in inactivating SARS-CoV-2 contaminated surfaces of personal items. We contaminated glass, metal and plastic samples representing the surfaces of personal items such as smartphones, coins or credit cards with SARS-CoV-2 formulated in an organic matrix mimicking human respiratory secretions. For disinfection, the samples were placed at different distances from UVC emitting LEDs inside commercial UVC-LED disinfection boxes and irradiated for different time periods (up to 10 minutes). High viral loads of SARS-CoV-2 were effectively inactivated on all surfaces after 3 minutes of irradiation. Even 10 seconds of UVC-exposure strongly reduced viral loads. Thus, UVC-LED boxes proved to be an effective method for disinfecting SARS-CoV-2 contaminated surfaces that are typically found on personal items.

中文翻译：

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用UVC-LED消毒盒消毒SARS-CoV-2污染的个人物品表面

严重的急性呼吸综合症冠状病毒2（SARS-CoV-2）通过紧密接触，小的气雾性呼吸滴并可能通过与受污染的表面接触而在人与人之间传播。在这里，我们调查了商用UVC-LED消毒盒在灭活SARS-CoV-2污染的个人物品表面方面的有效性。我们将SARS-CoV-2配制在模仿人类呼吸道分泌物的有机基质中，污染了代表个人物品（如智能手机，硬币或信用卡）表面的玻璃，金属和塑料样品。为了进行消毒，将样品放置在与商用UVC-LED消毒盒内的UVC发射LED不同的距离处，并照射不同的时间段（最多10分钟）。辐照3分钟后，高病毒负荷的SARS-CoV-2在所有表面上均有效失活。甚至10秒钟的UVC暴露也可以大大降低病毒载量。因此，事实证明，UVC-LED盒是一种消毒SARS-CoV-2污染表面的有效方法，这种表面通常出现在个人物品上。