Dr. Kellyann Niotis on Instagram: "Growing evidence links both viral and bacterial infections to a higher risk of Alzheimer’s, Parkinson’s, and other dementias. The driver appears to be inflammation rather than any single pathogen: systemic infection can disrupt the blood–brain barrier, activate microglia, and accelerate amyloid and tau biology, especially in people with genetic vulnerabilities like ApoE4. These associations can be seen even when infections occur more than a decade before sympto