Spray Coverage of Droplets: A Medical Biomechanics Analysis and Implication in COVID‑19 Prevention

Coronavirus disease (COVID‑19) pandemic is an important global public health problem at present. The disease can easily get transmitted from person to person and causes a wide scale of the outbreak. The secretion of droplets from an infected patient is the main vehicle carrying pathogens to the others.[1] The appropriate distancing is required for the preventive purpose.[2] The study on the movement of droplets in an indoor environment is interesting and can give useful data for disease prevention. In a previous report by Xie et al., droplets of various sizes can move at different distances.[3] Averagely, the large droplet from breathing can move at a distance before falling and the droplet expelled by sneezing or coughing can move more than 2 m [Table 1].