Mucous Membrane - The moist linings of body passages and internal cavities involved with absorption and secretion of substances.⏎
Infection - The entry, establishment, and replication of pathogens inside a host organism.⏎
Latent Infection - An infection that is currently not producing or showing any symptoms but has the potential of being reactivated and then manifesting symptoms.⏎
Mortality - The number of deaths in a given time or place.⏎
Immune System - The system of biological structures and processes that protects the body from foreign substances, including pathogens.⏎