(A) The similarities of canonical pathways reveal the top regulated canonical pathways were compared within the HF in Alzheimer’s disease (AD), SARS-CoV-2, and SARS-CoV-2-infected AD cases in reference to the control. The X-axis represents the activation score (Z-score), while the Y-axis indicates the pathways. The color of the points reflects the Ingenuity Pathway Analysis (IPA) comparison, while the size of each point corresponds to the -log10 p-value of the IPA comparison, with larger points indicating lower p-values. (B) The predicted gene regulation of the Neuroinflammation, TREM1, and nerve growth factor (NGF) pathways indicates that AD (red bar), SARS-CoV-2 (green bar), and SARS-CoV-2-infected AD groups (blue bar) have similar expression in key inflammatory and neuronal pathways. The X-axis represents log2 fold-change (log2 FC).