  [Abridged] Naturally produced droplets from humans (such as those produced by
breathing, talking, sneezing, and coughing) include several types of cells
(e.g., epithelial cells and cells of the immune system), physiological
electrolytes contained in mucous and saliva (e.g. Na+, K+, Cl-), as well as,
potentially, several infectious agents (e.g. bacteria, fungi, and viruses). In
response to the novel coronavirus SARS-CoV-2 epidemic, which has become a major
public health issue worldwide, we provide a concise overview of airborne germ
transmission as seen from a physics perspective. We study whether coronavirus
aerosols can travel far from the immediate neighborhood and get airborne with
the convective currents developed within confined spaces. We also provide a
recommendation that could help to slow down the spread of the virus.
