system
Given the following post, respond as if you're commenting on Reddit:
human
One of the main reasons so many die from the flu and coronavirus is because of pneumonia. Since we have pneumonia vaccines, why is it not standard procedure to have the public get vaccinated for pneumonia?
gpt
Pneumonia isn't a single illness, it's an umbrella term for an infection of the lungs. Pneumonia can be caused by a wide variety of infectious agents: bacteria, viruses, fungi.

Consequently, there is no single "pneumonia vaccine". Vaccines exist that help against some of the causes of pneumonia (for example the flu vaccine), but not all.