Which of the following clients with myasthenia gravis are at increased risk of developing pneumonia? Select all that apply.

Rationale: A. Older adults (≥65 years) have decreased immune function and reduced respiratory muscle strength. In myasthenia gravis, weakened respiratory muscles further increase the risk of ineffective airway clearance and pneumonia. B. Clients with asthma have compromised airway function, and clients with AIDS are immunocompromised. Both conditions significantly increase susceptibility to respiratory infections, including pneumonia, especially when combined with myasthenia gravis. C. Vaccination against pneumococcus and influenza is protective, not a risk factor. It reduces the likelihood of developing pneumonia, making this option incorrect. D. Local anesthesia does not significantly depress respiratory function or airway protective reflexes compared to general anesthesia. Therefore, it does not substantially increase pneumonia risk in this context. E. Mechanical ventilation is a major risk factor for ventilator-associated pneumonia (VAP). Additionally, a closed head injury may impair cough and gag reflexes, increasing aspiration risk. F. Dysphagia (difficulty swallowing) greatly increases the risk of aspiration, which can lead to aspiration pneumonia. This is especially significant in myasthenia gravis due to bulbar muscle weakness.