Vaccines
Killed, subunit or mRNA products teach recognition without requiring wild infection. Smallpox eradication (1980 declaration) is the extreme success story.
Human interfaces are uneven. Childhood infections, seasonal respiratory viruses and blood-borne lineages have different routes and different public-health tools.
This page is an atlas, not a clinic. Symptoms that worry you belong with a licensed clinician, not a self-diagnosis chart.
Body interfaces
Acute respiratory infection
Colds, influenza and COVID-class viruses spread on shared air. Risk is about dose, immunity and vulnerability, not moral failure.
Chronic and latent carriage
Herpesviruses and some hepatitis viruses persist. The host pays in immune surveillance; the virus pays in needing that host alive.
Oncolytic research (concept)
Some viruses preferentially damage certain tumour cells in trials. Public pages stay at the idea, not construction steps.
Immune memory
Surviving or being vaccinated leaves antibodies and T cells. That memory is why second measles is rare in immune people.
Spillover epidemics
New human outbreaks often start in animal reservoirs. Surveillance is ecology and hospitals, not a home experiment.
Vaccines, ventilation and not demanding antibiotics for a cold are complementary tools — none of them 'delete all viruses from the planet'.
Keep exploring
More in Tree of microbes
Bacteria
Single-celled prokaryotes with cell walls ? the oldest widespread life form, and both partners and pathogens.
Familiarity 95Fungi
A eukaryotic kingdom of yeasts, moulds and mushrooms — chitin walls, external digestion, partners of plants.
Familiarity 80Archaea
A prokaryotic domain that is not bacteria — methanogens, extremophiles and no known human pathogens.
Familiarity 35Bacteriophages
Viruses that infect bacteria — Earth's most abundant biological entities, and a concept-level idea in medicine.
Familiarity 42Protozoa
Motile unicellular eukaryotes — a teaching grade that includes pond ciliates and a minority of serious parasites.
Familiarity 58