Can you explain how pneumonia spreads and attacks the body?

Pneumonia: Pneumonia occurs when pathogens infect the spaces where you breathe, your trachea or windpipe expands into a big network of airspaces where oxygen is brought into close contact with blood. When our immune system experiences a breach, these organisms can grow and enter the bloodstream in addition to interfering with gas exchange. Pathogens in the bloodstream then sail to and attack anywhere.

Pneumonia : Pneumonia is a infection of lungs. It can be bacteria, viral or fungal. Fungal is rare and happens mainly in immunocompromised people . Bacterial is common and spreads through droplet infection( cough , sneezing,). Bacterial can be community acquired or hospital acquired( durning hospital admissions). Treatment depends on the cause and likely bugs causing it .