Droplets are a primary mode of transmission for many infectious diseases. When an infected person expels droplets, these droplets can travel short distances before settling on surfaces or being inhaled by another person. This can lead to direct transmission if the droplets make contact with mucosal surfaces such as the eyes, nose, or mouth of another person. Additionally, droplets can contaminate surfaces, leading to indirect transmission when another person touches the contaminated surface and then touches their face.
