This is just due to the fact that it is easier for viruses to spread between people. A pneumonia infection cause by a bacteria-like germ known as mycoplasma is contagious and people catch it like they would generally catch a cold. Sometimes it is only possible to catch pneumonia depending on the environment you are exposed to. An example of this is Legionnaires’ disease which is a type of pneumonia only contagious to people who are exposed to a polluted air-conditioning.
This is just due to the fact that it is easier for viruses to spread between people. A pneumonia infection cause by a bacteria-like germ known as mycoplasma is contagious and people catch it like they would generally catch a cold. Sometimes it is only possible to catch pneumonia depending on the environment you are exposed to. An example of this is Legionnaires’ disease which is a type of pneumonia only contagious to people who are exposed to a polluted air-conditioning.