In the flight cabins, because of the densely packed environment, the cough-jet released by a SARS-Cov-2 infected person is expected to break the local airflow, particularly the jet zone, and travels both forward and backward directions in the proximity of the point of exit (Fig. 5
b). Since the velocity of exiting the violent expiration (coughs) is around 10 m/s, the droplets may travel four to five seats ahead, and the aerosol-cloud could go even further away (Fig. 5
b). However, there is no lateral movement expected except the immediate passenger on either side. In contrast to the forward movement, there is a backward movement of droplets typically by one seat, but the aerosol movement may be more. This phenomenon illustrates that about five to ten people could get infected with the disease with an infected person onboard. Nevertheless, the propensity of getting sick by exposure to a plume of aerosols produced by cough-jet is poorly understood, and the actual number of contracted cases may be far from recorded. The Brownian motion followed by airflow jet movement governs the aerosol plume, after the dissipation of advective transport. Such movement supports an agglomeration of virus-laden aerosols in fomites at passenger levels. It is, therefore, crucial to decide by all airlines that such suspicious fomites such as papers, magazines, pillows, and blankets be disposed of perhaps subjected to thermal destruction until the COVID-19 pandemic recedes.