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An experiment with a black light has shown how fast germs and viruses can spread in restaurants when only one person is infected.
Hundreds of tourists were infected with COVID-19 on a cruise in Japan, with a buffet in the Boat It is believed to be where most people got it.
The new experiment simulates the extent to which a virus can spread in a buffet setting using paint invisible to the naked eye to represent the virus.
Participants put food on their buffet plates. Pic: NHK
Made by Japanese state broadcaster NHK in collaboration with infection experts, the video shows 10 people entering the restaurant, with one of them “infected” with the paint.
The group sits at a table before going to the buffet table to serve food on their plates before sitting down to eat.
The painting had spread to everyone’s hands and food. Pic: NHK
The painting also appeared on the invoice. Pic: NHK
Black lights come on, illuminating where the “virus” has spread from a person.
The painting, which glows white in the light, can be seen on the hands of all the participants and on the faces of most of them, especially around the mouth.
It is also in the food, the tongs, the lid of the food containers, the handle of a drink jug, all the dishes, the tablecloth and the ticket.
John Nichols, professor of pathology at the University of Hong Kong, told CNN that the video “really highlights the need for what people have said about hand hygiene to stop the spread of the disease.”
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The video was released when Stanford University research found that talking transmits the virus.
The more people talk, the more droplets scatter, the study found.
The researchers said that with just a minute of speaking out loud, at least 1,000 infected drops remain in the air for more than eight minutes.
These can be inhaled by other people, triggering a new COVID-19 infection.
