School winter
A single vomit in a classroom can seed a week of absences.
Closed rooms make arithmetic visible. The same virus is quieter in a well-ventilated house with one careful sick person.
Hospitals fear ward closures. Food businesses fear an ill cook. Those are occupational interfaces.
Body interfaces
Cruise cabin
Shared corridors and buffets turn a low dose into a visible epidemic curve.
Hospital ward
Frail patients and shared toilets make norovirus a closure-level event.
Oyster harvest
Filter feeders can concentrate virus from sewage-tinged water.
Catering hands
Ready-to-eat assembly is a classic point of control when staff are ill.
Home bathroom
One household can contain a chain with soap, isolation of the sick room, and patience.
Dehydration care is clinical when drinking fails, especially in the very young and old.
Keep exploring
More in Encounters
Influenza
A winter respiratory virus of drift and rare shift — surveillance and vaccines, not a cartoon villain.
Familiarity 93Tuberculosis
An airborne bacillus of latency and long care — programmes and air, not a drug recipe.
Familiarity 70Escherichia coli
Usually a gut resident; a minority of STEC pathotypes drive foodborne headlines.
Familiarity 82Staphylococcus aureus
A common skin neighbor and a resistance story called MRSA — not scare porn.
Familiarity 78Helicobacter pylori
A gastric spiral that rewrote the ulcer textbook — Nobel 2005, Korea's high historic prevalence, no recipes.
Familiarity 68