The study, released on Sunday, shed light on an ongoing heated debate on whether wearing masks would help prevent the transmission of the deadly coronavirus.
In each set of the experiment, hamsters were separated in two groups and placed in two cages, with one of the groups infected with Covid-19. In the first experiment, no surgical masks were placed between the two cages. In the second one, a surgical mask was placed closer to the healthy hamsters. In the third experiment, the mask was placed closer to the infected, as if the healthy ones or the infected were wearing masks.
With no partition in between the cages, two-thirds of the healthy hamsters were infected a week later. In the following two experiments with masks in between, the infection rates were lowered to one-third and one-sixth respectively.