  This study deals with the estimation of the trajectory of coronavirus
COVID-19 adhering to respiratory droplets projected horizontally, considering
the geographical altitude. The size of viruses and respiratory droplets is the
factor that determines the trajectory of the microparticles in a viscous medium
such as air; For this purpose, a graphical comparison of the diameters and
masses of the microparticles produced in respiratory activity has been made.
The estimation of the vertical movement of the microparticles through the air
is based on Stokes' Law, it was determined that respiratory droplets smaller
than 10 {\mu}m in diameter have very small speeds, in practice they are
floating for a few seconds before evaporating in the air; Regarding the
horizontal displacement of respiratory droplets, frames from Scharfman et al.
to determine its scope. In the case of a sneeze, the respiratory droplets can
reach a distance of 1.65 m in 1 s, stopping rapidly until reaching 1.71 m in 2
seconds, then an analysis of the effect of geographical altitude on the
movement of the micro-droplets was made, determining minimal change in
kinematic variables.
