Milestones in order. This is history, not a weekly activity grid.
- H1N1 pandemic
- H2N2 Asian flu
- H3N2 Hong Kong flu
- Eigen quasispecies
- H5N1 in Hong Kong
- H1N1 pandemic
- SARS-CoV-2 pandemic
- Delta then Omicron
Darker cells mean a higher score for this topic on that metric.
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Quick answers
Where should I start with Mutation and variants?
Read Identity → How they live → Body & health, then use compare rails.
Is this page advice for Mutation and variants?
Public-health education — not a care plan, prescription, or outbreak briefing.
What does the local lens add?
It names everyday desks for Change & defence before English norms look universal.
Are the scores a ranking of Mutation and variants?
No — editorial 0–100 browsing aids inside this atlas only.
How do I compare Mutation and variants to neighbours?
Use related cards and best-of / quiz rails after the first three chapters.
Which chapter is densest?
How they live and Body & health carry mechanisms; skim Identity first.
Pandemic years are when reassortment or a new zoonotic jump becomes visible. Most evolution is quieter winter drift.
SARS-CoV-2 added real-time genome dashboards. The public learned lineage names that influenza scientists had used more quietly for decades.
Timeline
A severe influenza pandemic showed how a novel antigenic package can sweep a world without modern vaccines.
A reassortant H2N2 subtype replaced H1N1 in humans — a classic antigenic-shift pandemic.
Another HA shift produced H3N2, still a major seasonal actor after decades of drift.
Theoretical work framed replicators as error-prone clouds, later a standard RNA-virus metaphor.
Human cases of avian H5N1 raised zoonotic-shift fears; control focused on birds and exposure, not home experiments.
A triple-reassortant H1N1 spread globally; seasonal H1N1 was displaced. Vaccines were updated the following season.
A new coronavirus spread worldwide. Genome sharing made lineage tracking a public dashboard.
WHO VOC labels marked lineages with different spread and immune-escape profiles in 2021–22.
History here is surveillance history, not a manual for making viruses.
Keep exploring
More in Change & defence
Antibiotic 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 38Hygiene and balance
Clean water saves lives; missing old microbial partners is a separate, still-debated immune story.
Familiarity 70Horizontal gene transfer
Sideways DNA traffic — conjugation, transduction, transformation as names and history, not protocols.
Familiarity 45