中国奥运代表团“零感染”，日媒探究原因发现了这个“黑科技”！
在东京奥运会上，中国奥运代表团不仅收获了骄人战绩，而且777人无一新冠病例，全部安全回家，实现了代表团出征前立下的“零感染”目标。
东京奥运会开幕式上的中国代表
在日本本土疫情不容乐观、感染人数日益递增的情况下，中国代表团能平安归国，截至目前无一人感染新冠病毒，这引来外媒聚焦：他们是怎么做到的？
其实，在口罩、疫苗、常规的消毒设备等防疫措施以外，中国代表团背后还有一项叫做“光疫苗”的黑科技。在供运动员康复、训练的中国之家（China House）和奥运村每个中国运动员房间内，共配备有200多台“光疫苗”设备，持续消杀空气和环境中的病原体，提高生物安全性。
Resembling amini electric fan, an ultraviolet disinfection device that is able to achieve 99.9 percent sterilization, including killing the COVID-19 virus, helped keep Team China free of infections at the Tokyo 2020 Olympic Games.
The equipment helped the 777 members of Team China to eliminate microorganisms, including viruses and bacteria, from the air and surfaces.
More than 200 of the devices played their role in providing a safe environment for the athletes, coaches and other workers, in their exercise venues as well as the athletes' bedrooms.
8月4日，日本朝日新闻、日本经济新闻等媒体集中报道了中国代表队使用的“盘外招”：一种针对病毒细菌等微生物、尤其是针对新型冠状病毒，能实现99.9%杀菌的先进紫外线消毒设备。在有人的环境中也能有效消杀，是这一设备的一大优点。
An advantage of the device is that it can work in a human environment in real time, said Shanghai's Fudan University, one of its developers.
这正是222纳米“光疫苗”——一项由哥伦比亚大学、复旦大学、上海市重大传染病和生物安全研究院与星际光（上海）实业有限公司共同研发的对抗新冠的“黑科技”。
人机共存，消灭99.9%新冠病毒
德尔塔变异毒株来势汹汹，具有很强的传染性。“光疫苗”的出现，就是通过创造一个病毒无法传播的环境，来保护人类。
复旦大学上海医学院副院长、上海市重大传染病和生物安全研究院院长吴凡介绍说：“'光疫苗’能够发出222纳米波长辐照能量，被新冠病毒高度吸收后其核糖核酸（RNA）螺旋结构链接被破坏，导致其失去复制能力从而达到消杀效果。”
Wu Fan, vice-dean of Fudan University's Shanghai Medical College, explained that the device uses short-wavelength ultraviolet light technology.
The device can emit a 222-nanometer wavelength that is absorbed by the novel coronavirus. The helical structural link of the ribonucleic acid of the virus is destroyed and the virus loses its ability to replicate, Wu said.
事实上，所有病毒，细菌，真菌类的微生物，都可以通过特定波长光谱照射进行消杀。
因为222纳米短波长无法穿透皮肤和眼睛，对人体无害，所以可以在有人时进行消毒。“光疫苗”，解决了一个消毒领域的难题：实现“人机共存，实时消毒”。
'As the short wavelength of 222 nanometers won't penetrate human skin and eyes, it is harmless to the human body and can work when people are around,' said Wu, who is also director of the Shanghai Municipal Institute of Major Infectious Diseases and Biosafety.
'The coexistence of people and disinfecting machines in the same environment with the machines working in real time is actually a thorny problem. This device conquers it,' she said.
“光疫苗”距离民用有多远？
不仅是在今年的东京奥运会，在郑州的抗灾防疫战中，“光疫苗”也被送往了多家医院，助力保障医护人员工作环境的微生物安全。在4度以上环境，“光疫苗”都能实现消杀。
The devices, which are able to kill the COVID-19 virus at temperatures above 4 C, have also been sent to hospitals in Zhengzhou, Henan province, to provide doctors and nurses with a safer environment in the fight against the novel coronavirus, according to Fudan University.
“民用是今后的必修课。在未来疫情防控常态化的趋势下，科技将逐渐走向民用民生。”吴凡表示，适合各种场景的民用“光疫苗”产品也正在抓紧研发中。
她介绍说：“222纳米波长的光适合于有人的场景，对于人员密度越高，人流量大的场所，以及医院、养老院等特殊场所特别能体现其优势。”
'Our ultimate goal is that the equipment will be popularized for civil use. The machine will show its advantage in public venues with high population density, such as medical institutions, nursing homes for the elderly, transportation hubs and commercial centers,' said Wu.
“医疗机构使用的传统紫外光消毒，必须人员离开后才能进行，而这项技术却可以在发热门诊等高风险场所持续使用。未来在交通枢纽、商业场所等也都有广阔的应用前景，可以净化环境，提高生物安全性。”吴凡说。
'Traditional ultraviolet light disinfectors used in medical institutions can only operate when nobody is around, while this technology allows the new devices to work continuously in high-risk venues, such as fever clinics,' she said.
不过，“光疫苗”也非万能。“光不会拐弯。在光照不到的地方，例如，物体的背面如果照不到，就不能消毒。任何技术都有其适用范围和场景。”
记者：周文婷
编辑：左卓
实习编辑：李金昳