Final answer:
Mycoplasma pneumoniae is the microbe that causes 'walking pneumonia.' It is spread through aerosols and is common in crowded environments like college campuses and military bases.
Step-by-step explanation:
Mycoplasma pneumoniae is the microbe that causes 'walking pneumonia.' This bacterium is not part of the respiratory tract's normal microbiota and can cause epidemic disease outbreaks. It is spread by aerosols formed when coughing or sneezing and is common in crowded environments like college campuses and military bases. The disease is often mild, with a low fever and persistent cough.