FA-65062 / Epidemic compartment models / Member archive

SIR with daily all-or-nothing vaccination campaign: campaign start · case 02

The campaign starts one day late.

Member previewVariant 2 · 3 implementations · 7 checks per implementation

Case contract

Each day from day index start_day (inclusive), dose=min(doses_per_day, S) is given to susceptibles before transmission; dose*efficacy moves S->V; failed vaccinees stay in S; mixing uses the full pop; return [S, I, R, V, doses administered] rounded to 3.

Why this case matters

Compartmental epidemic calculations drive outbreak forecasts, vaccine targets and hospital planning; a single wrong flow, rate conversion or boundary silently changes every downstream number.

One recorded failure

Sample boundary fixture

This sample comes from the broken implementation of a controlled reproducer.

Boundary fixture	Actual	Expected	Outcome
regression: city campaign from day 5	`[4043.726, 365.712, 1270.562, 4320.0, 4800.0]`	`[4007.174, 324.024, 1168.803, 4500.0, 5000.0]`	Failed

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