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PNEUMONIA
Pneumonia is a disease of the lungs and the lower respiratory system.
The lung contains many small bulbs, or sacs, called alveoli. These help to take out oxygen from the air. In the case of pneumonia, these bulbs become inflamed. The lungs fill up with a fluid which is called pus, and can no longer absorb as much oxygen as before. This is called empyema or emphysema . This makes it hard for the person with pneumonia to breathe. They may feel out of breath, or like they are drowning. They may also feel pain when they breathe. Sometimes people die of pneumonia, even when they go to a hospital and take medicine .

In the UK, pneumonia is one of the leading causes of hospital admissions and is particularly impactful among vulnerable populations such as the elderly, very young children, and those with pre-existing health conditions. According to Public Health England, there are approximately 250,000 cases of pneumonia each year, resulting in around 40,000 hospital admissions and thousands of deaths annually.

Bacterial pneumonia, most commonly caused by Streptococcus pneumoniae, is frequently linked to serious complications if not promptly treated. Viral pneumonia, often resulting from influenza or respiratory syncytial virus (RSV), has become more prevalent, especially during seasonal outbreaks. Risk factors include smoking, chronic obstructive pulmonary disease (COPD), diabetes, and a weakened immune system, all of which exacerbate the likelihood of developing pneumonia.

Common symptoms of pneumonia include cough, chest pain, difficulty breathing, fatigue, and fever. Early diagnosis is crucial, as it can lead to timely intervention. Healthcare providers typically rely on physical examinations, imaging tests such as chest X-rays, and laboratory tests (such as blood cultures) to confirm the diagnosis.

Treatment for pneumonia varies based on its cause and severity. Bacterial pneumonia is usually treated with antibiotics, while viral pneumonia may require antiviral medications. For patients with underlying health issues or severe symptoms, hospitalization may be necessary for more intensive care, including oxygen therapy or intravenous antibiotics.