Follow three different organism stories through the respiratory system. Notice how exposure, infection, and illness differ.
Influenza viruses can infect the nose, throat, and lungs. Read the profile’s illness context.
Respiratory viruses with illness ranging from mild to severe.
Read how inactive TB infection differs from active TB disease.
The bacterium behind TB. Active disease differs from latent infection.
Aspergillus spores can be inhaled from the environment. Read why most people exposed do not get sick.
An environmental mould associated with several forms of aspergillosis.