Five effects that are still being studied in older people several years after COVID-19 vaccination.

1. A deep tiredness that does not resemble that of before
Margaret, 72, was always an active woman. He would get up early, tend to his garden and enjoy long walks. His energy was part of his identity.

Months after her second vaccination, she began to feel different. He slept the same, ate well, moved, but the tiredness did not disappear. It was not exhaustion from exertion, but a deep, persistent fatigue, as if the body was running on less energy than usual.

The medical tests showed no clear alterations. However, she knew something didn't fit. The most difficult thing was not only the physical fatigue, but the feeling of having lost a part of who he always was.

2. Mild and fluctuating
cognitive difficulties Heinrich, 68, always stood out for his memory and mental clarity. But over time she began to notice small forgetfulness: words that did not come out, readings that needed to be repeated, moments of temporary confusion.

It wasn't constant. There were completely normal days and others when I felt a kind of "brain fog". That irregularity was the most disturbing thing, because it did not follow a clear pattern.

The greatest fear was not forgetfulness itself, but doubt:

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