Black Light Experiment: A new way to detect the rapid spread of coronavirus

One infected person can contaminate hundreds of people, which explains how the whole world is being hit by the strong wave of the current global pandemic. In regard to this, Japan shares a viral video which displays very clearly how easily germs and viruses can be passed on to others in restaurants when one person is positively tested with coronavirus.

To detect the spread of the pandemic, the black light experiment has been effectuated in the video. Ten people come into the restaurant. One of them is infected.

A fluorescent substance that represents the virus is applied to the inflicted man’s hands. The other people act as they would normally do, that is, they make as if they are not taking the potential contamination in consideration.

At the end of the short film, everyone casts his hands under black lights which visibly show the infection which has spread. The substance which was used to represent the virus and germs is seen on utensils, food, and even on the faces of the customers.

This video, carried out by the public broadcasting organization NHK in collaboration with health experts, is indeed a dynamic one with a very powerful message to the whole world. For instance, the importance of hand-hygiene is again reinforced.

A second experiment was also conducted by NHK. This time, in the same stimulated environment, all the necessary precautions were taken. The people washed their hands properly, both before and after eating. At the end, the black lights indicated there is no sign of the coronavirus which has already been wiped off through proper hand-washing.

John Nicholls, a clinical professor in pathology at Hong Kong University, however does not fully agree with the purpose of NHK’s video. He labels it as ‘artificial’ since according to him, the infected person’s hands contained so much fluorescent liquid that it would not really reflect the amount of germs on someone’s hands.

Kentaro Iwata, an infectious disease specialist at Kobe University, says “The experiment just described the possibility of the spread by contact, and that is not proof of what happened, so the distinction has to be clearly made between what could happen and what did happen”.

It should be reminded that Japan has already been hit a second time by the complacent coronavirus. Johns Hopkins University underlines 16, 049 positive Covid-19 cases, and 678 deaths there.

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