Indicator detail

Flu-like (ILI) ED visits

Sample ED syndromic feed (county aggregate)

Baseline

120

visits / day

Current

visits / day

Deviation

−0.2σ

vs baseline

Signal

Normal

How this is scored

Deviation z = (current − baseline) / √baseline — a Poisson-style spread suited to counts. A score of 3σ or more is an alert; 2σ or more is a watch. Levels are signals to investigate, never conclusions. Aggregate counts only.

Scoring history (newest first)

indicator.cmr0xz.log

2026-06-30 17:49:55  base 120  cur 118    −0.2σ  normal