Viruses are not cells. They are DNA or RNA genomes in protein coats — sometimes wrapped in a stolen membrane — that can make more of themselves only inside a living host. That host rule explains the whole public story: vaccines train recognition, antibiotics miss the target, and most viral lineages on Earth never notice a human being.
This atlas treats viruses as a branch of the microbial world, not a synonym for 'the worst disease'. Later topics cover phages, vaccines and everyday encounters. People knew smallpox and rabies for centuries without a particle theory. Porcelain filters in the 1890s showed something smaller than bacteria could still transmit disease.
Mark each measure High, Any or Low for what you want. The fit number moves with every mark, and your marks follow you to the next page in this app.
| Measure | Viruses | Archaea | You want |
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| Medical weight | |||
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| Risk | |||
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| Live debate |
Mark at least one measure to see a fit number.
Scores are the atlas’s 0–100 teaching marks for each topic. They are not a diagnosis, a dose or a treatment choice.
Tick a point once you could explain it in your own words. Ticks stay on this device.
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All points done. Next: Open the topic: Viruses
Viruses are not cells. They are DNA or RNA genomes in protein coats — sometimes wrapped in a stolen membrane — that can make more of themselves only inside a living host. That host rule explains the whole public story: vaccines train recognition, antibiotics miss the target, and most viral lineages on Earth never notice a human being.
This atlas treats viruses as a branch of the microbial world, not a synonym for 'the worst disease'. Later topics cover phages, vaccines and everyday encounters. People knew smallpox and rabies for centuries without a particle theory. Porcelain filters in the 1890s showed something smaller than bacteria could still transmit disease.
The twentieth century added crystals, bacteriophage genetics and electron microscopes. Each tool made 'filterable fluid' look more like organised matter. Dmitri Ivanovsky shows tobacco mosaic disease passes a bacterial filter — a founding observation of virology.
Martinus Beijerinck calls the agent contagium vivum fluidum — living, fluid, and not a cultured bacterium. Peyton Rous transmits a hen tumour with a filtrate, linking some cancers to viruses decades before oncogenes were named.
This is education from the atlas. It does not diagnose and does not prescribe a dose. It does not replace the full topic page.
Next question: Archaea · Open the topic: Viruses
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