Results
SE
We detected 19,430 (SE 2,691) droplets in the control group; 80 (SE 19) in the breath-guard (Histogram of average number of droplets vs size for control, breath-guard, and face-mask with a breath-guard.Using the mean area of the targets covered in spots as a measure, there was a 99.93% reduction in droplet spread with breath-guard and a 99.98% with the face-mask and breath-guard group. We also noted fluorescein splattered on the floor and on the researchers, this was invisible to the human eye but illumination under UV light revealed the spots within the environment.