A Japanese experiment has shown just how effective the buffet dining experience is as a viral superspreader. 

In a simulation using invisible fluorescent paint at a mock buffet, just one ‘infected’ guest managed to spread the virus to nine fellow diners.  

The experiment, carried out by Japan’s national television broadcaster NHK in collaboration with infectious diseases experts, was designed to show how easily a virus may have spread on cruise ship buffets.  

A blob of fluorescent paint, visible only under ultraviolet light, was applied to the palm of one guest, according to a statement from NHK.