CLINICAL MEDICINE

Detailed explanation-1: -Coughs and sneezes create respiratory droplets of variable size that spread respiratory viral infections. Because these droplets are forcefully expelled, they are dispersed in the environment and can be inhaled by a susceptible host.

Detailed explanation-2: -Viruses. The most common cause of a cough is a respiratory tract infection, such as a cold or the flu. Cough is associated with coronavirus disease 2019 (COVID-19), too.