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Vaccinologists have not focused their research on tailoring vaccines to induce robust immune responses in the elderly. (Shutterstock)

Why vaccines are less effective in the elderly, and what it means for COVID-19

Immunosenescence — the decline of immune system function with age — means that vaccines are not as effective in older adults, the demographic most susceptible to many diseases, including COVID-19.
At a molecular level, stresses and strains can make your body clock break into a sprint. Lightspring/Shutterstock

Tick, tock… how stress speeds up your chromosomes’ ageing clock

Emerging evidence suggests that prolonged stress exposure can accelerate the ticking rate of an internal cellular clock. By doing so, stress can contribute to faster ageing and body deterioration.

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