Flu vs cold
Public English mixes them. Influenza is the vaccine-campaign disease.
CDC seasonal campaigns, Southern-hemisphere timing, and ‘stomach flu’ (often not influenza) are the local vocabulary traps.
This is not your yearly medical advice. It is the naming layer so news and leaflets stop collapsing.
Local notes
Stomach flu
Often norovirus in clinic English. See that topic.
Shot language
Flu shot is ordinary US English. It is a public programme, not a DIY.
Official pages own schedules and treatment. This atlas does not.
More in Encounters
Tuberculosis
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 78Norovirus
A very-low-dose gut virus of schools and ships — soap and bleach surfaces, not alcohol-gel faith.
Familiarity 80Helicobacter pylori
A gastric spiral that rewrote the ulcer textbook — Nobel 2005, Korea's high historic prevalence, no recipes.
Familiarity 68