PROFESSOR: In Chapter 1, we'll study the transfer
of respiratory pathogens.
Specifically, we'll consider bacteria and virus, which
originate in the lungs or in the pharynx in the body
and are transmitted by forming droplets
during the act of exhaling-- by breathing, or speaking,
or other respiratory activities,
and we'll study the fate of those droplets.
Will they shrink by evaporation?
Will they fall and sediment to different surfaces?
Or will they be inhaled by an susceptible person
and thereby transmit the infection?