Final answer:
The patients most at risk for developing pneumonia are a female recovering from abdominal surgery, a male with COPD and on continuous oxygen therapy, and an 8 month old with RSV infection.
Step-by-step explanation:
The patients who are most at risk for developing pneumonia are:
- A 53 yo female recovering from abdominal surgery: Abdominal surgery can weaken the immune system and impair lung function, increasing the risk of pneumonia.
- A 42 yo male with COPD and is on continuous oxygen via nasal cannula: COPD is a lung disease that decreases lung function and makes it easier for bacteria to cause pneumonia. Continuous oxygen therapy can also increase the risk of infection.
- A 8 month old with RSV infection: RSV (respiratory syncytial virus) infection can lead to pneumonia, especially in young children who have underdeveloped immune systems.