Mrs.Wilson is 78 years old and over the past few years she has become increasingly susceptible to bouts of pneumonia.This can most clearly be attributed to

Question

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As individuals age, their immune systems weaken and become less effective at fighting off infections, making them more susceptible to illnesses such as pneumonia. Slower neural processing (A), brain plasticity (C) and neurogenesis (D) may play a role in aging but are not directly related to an increased risk of pneumonia.

MrsWilson Is 78 Years Old and Over the Past Few