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Why Medical Imaging Sometimes Reveals Changes
Advanced imaging technologies can detect subtle biological activity throughout the body.
In some cases, scans performed shortly after vaccination have shown temporary increases in activity within lymph nodes or nearby tissues. Medical experts note that these findings are often consistent with a normal immune response.
Because imaging technology has become increasingly sensitive, doctors are able to observe biological processes that might previously have gone unnoticed.
Researchers caution that imaging findings should always be interpreted within the broader context of a patient's medical history, symptoms, and clinical evaluation.