<p>1. Introduction: Microbial metabolite interference of protein biosynthesis in neurodegenerative, neurodevelopmental, and other disorders; microbial metabolites hijacking vagus nerve<br>2. COVID-19: Scientific progress<br>3. Viral-bacterial interactions in diseases<br>4. Vagus nerve: Acid reflux, parietal cells, carpal tunnel syndrome, Alzheimer’s disease, COVID-19, stroke, cancer, and other diseases<br>5. Vagus nerve circuit: Microbiome—tryptophan metabolites—receptors and synapses<br>6. Glutamate and glutamate receptors in vagus nerve pathways and in Alzheimer’s disease<br>7. Aminoacyl tRNA synthetase multiple forms in autoimmune and infectious diseases<br>8. Crystalized aromatic l-amino acid decarboxylase from bacteria Micrococcus percitreus catalyzing decarboxylation of tryptophan and l-DOPA (Levodopa or 3,4-dihydroxy-l-phenylalanine)<br>9. Health effects of elevated CO2 levels, sparkling mineral water, seltzer carbonated water<br>10. Microbial antigens, allergies, and antibodies to microbial allergens: Significance of preexisting antibodies and stress for vaccination<br>11. Smell and taste identification deficits in disease<br>12. Microorganisms producing biogenic amines: From food to human body<br>13. Human genome or human microbiome genes: Which one is more important for human health and intellectual abilities?<br>14. Microorganisms used in agriculture, consumed from environment and associated with the edible raw fruits, vegetables, herbs, sprouts, and mushrooms<br>15. Molecular and cell aggregation: Biogenic amines, proteins, platelets, and microbial pathogens<br>16. Colonic diverticular disease as a risk factor for neurodegenerative and associated diseases<br>17. Alzheimer’s disease, dementia, aging, and COVID-19<br>18. Existing vaccines and new and old tools<br>19. Serotonin syndrome in neurodegenerative diseases and COVID-19: Mechanisms and consequences of intestinal infection<br>20. Circulating cell-free mitochondria and membrane vesicles<br>21. Protein synthesis inhibition in neuronal activities<br>22. Rosacea and associated medical disorders<br>23. Bacterial internalization in cancer and other medical conditions: Intracellular pathogens<br>24. Ocular changes resulting from reading and writing on smartphone and computer: Computer vision syndrome, dry eye disease, meibomian gland dysfunction, chalazion, occupational overuse syndrome<br>25. Viral infections in vagus nerve<br>26. Microbial tryptamine in Type 1, Type 2, and Type 3 diabetes</p>
