Final answer:
Shingles is associated with immunosenescence in an older adult due to the weakening of the immune system with age. It's caused by the reactivation of the varicella-zoster virus, which is more likely as the immune system declines (Option B).
Step-by-step explanation:
The nurse associates shingles with immunosenescence in a 68-year-old woman. Immunosenescence refers to the gradual deterioration of the immune system brought on by natural age advancement, which can result in a higher susceptibility to infections, diseases, and immune system disorders.
Shingles, also known as herpes zoster, is caused by the reactivation of the varicella-zoster virus, which lies dormant in individuals who have had chickenpox. It is particularly associated with aging and a declining immune system, making older adults more prone to developing this painful rash.
Thus, the correct option is B.