Final answer:
The patient should seek immediate medical treatment for any upper respiratory infections to prevent a relapse of pneumonia.
Step-by-step explanation:
To prevent a relapse of pneumonia, the patient should seek immediate medical treatment for any upper respiratory infections. This is because upper respiratory infections can potentially worsen and lead to a relapse of pneumonia.
Continuing to do deep breathing and coughing exercises for at least 12 weeks is not necessary to prevent a relapse of pneumonia. These exercises are typically done during the acute phase of pneumonia to improve lung function and clear secretions, but they are not specifically aimed at preventing a relapse.
Increasing food intake to 2400 calories a day to keep the immune system well is not a measure to prevent a relapse of pneumonia. While maintaining good nutrition is important for overall health, it does not specifically prevent a relapse of pneumonia.
Having a follow-up chest x-ray in 6 to 8 weeks to evaluate the pneumonia's resolution is an important measure to monitor the progress of pneumonia, but it does not directly prevent a relapse.