The immune system tends to weaken with advancing age, meaning older people are

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The question asks about how the immune system changes with age and what this implies for older people.
Option 1: 'unsafe in assisted living communities.' This phrasing is vague and sounds normative rather than based on immune function. It does not precisely describe immunosenescence or infection risk; safety in a setting depends on many factors beyond age alone, such as sanitation, vaccination, and staff practices.
Option 2: 'especially vulnerable to infections.' This aligns with what is known about aging: immune system aging (immunosenescence) reduces the ability to respond to new pathogens, leading to higher susceptibility and more severe infections, making older adults more at risk.
Option 3: 'the source for most epidemics.' This claim is inaccurate. While older adults can spread infections, they are not the primary source of most epidemics; epidemics arise from transmission networks across all ages and populations, and older individuals are not inherently the leading source.
Option 4: 'the biggest transmitters of infectious diseases.' There is no general evidence that older people are the biggest transmitters; transmission depends on exposure, contact patterns, and pathogen characteristics, and younger populations can be major drivers in many outbreaks.
Option 5: 'particularly resistant to vaccinations.' This is not accurate as a blanket statement; vaccine responsiveness in older adults can be diminished compared to younger individuals, but vaccines remain beneficial and are often tailored (e.g., higher-dose or adjuvanted vaccines) to improve protection. Saying they are 'particularly resistant' overgeneralizes and ignores ongoing improvements in immunization strategies.
In summary, the statement that captures the core reality of aging and immunity is the one describing increased vulnerability to infections due to immunosenescence, while the other options mischaracterize the nature of risk, transmission, and vaccine responses in older adults.

KNSFHP 1103 SP2025 (14059) Module 5 Exam

The immune system tends to weaken with advancing age, meaning older people are

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