Which microbes are the Old Friends?
Candidates include certain gut and environmental taxa. A shopping list is not settled.
Researchers still argue which organisms train regulation and whether urban design can supply them safely.
Helminth therapy trials exist in clinics. They are not a backyard project.
Open questions
Can cities design immune-friendly green space?
Biodiversity around homes is studied. Causality is still being unpacked.
Do C-section and formula change set-points?
They change early colonizers. Outcomes vary and are not a verdict on needed surgery.
Is there a safe worm therapy?
Clinical trials test regulated products. Do not import parasites as self-care.
How do we talk without anti-vax capture?
Separate sanitation wins from missing-partner science in every sentence.
The frontier is safer diversity, not nostalgia for cholera.
Keep exploring
More in Change & defence
Mutation and variants
Populations of genomes, not cartoon villains — RNA viruses copy sloppily, and public-health names track clusters that spread.
Familiarity 92Antibiotic resistance
A shared drug budget under selection in hospitals, farms and wastewater — stewardship, not a lab manual.
Familiarity 85Vaccines and immunity
Antibodies, memory cells and community arithmetic — conceptual, not a prescription and not an anti-vaccine tract.
Familiarity 94Biofilms
Surface cities of microbes — plaque and catheters explain persistence, without a grow-your-own kit.
Familiarity 38Horizontal gene transfer
Sideways DNA traffic — conjugation, transduction, transformation as names and history, not protocols.
Familiarity 45