Black light experiment shows how quickly a virus like Covid-19 can spread in a restaurant

Black light experiment shows how quickly a virus spreads

The video shows 10 people entering the restaurant, one of whom was identified as the “infected” person. Each participant makes the buffet as usual, without taking into account potential contamination.

At the end of the video, the participants are projected under black lights illuminating where “the infection” has spread.

The substance, used to signify germs, can be seen on food, serving utensils and trays, and even on the faces of some of the participants.

Here’s what the experts have to say

Although this type of experiment is not new, John Nicholls, clinical professor of pathology at the University of Hong Kong, said that it demonstrates how quickly a virus can spread, especially when handwashing is not performed.

“What the video has demonstrated is that it will spread to surfaces and people very effectively,” Nicholls told CNN, “and I think it really highlights the need for people said about hand hygiene to stop the spread of disease. “

However, Nicholls said the situation is “artificial” because the emphasis is on touch alone.

Kentaro Iwata, an infectious disease specialist at Kobe University, agreed.

“Experience has just described the possibility of spread by contact, and this is not proof of what happened, so the distinction must be clearly drawn between what could happen and what happened” , Iwata told CNN.

But the two experts said the experience was a good way to show the importance of hand washing.

For scientific reasons, Nicholls said it would be even more effective to see the experiment after the “infected” person had washed his hands for five and ten seconds.

“So the general public has an idea of ​​the mechanism by which to determine to what extent handwashing can actually reduce the transmission of potentially infectious materials,” said Nicholls.

CNN’s Bex Wright contributed to this report.


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