Free tool · Estimator
Legionnaires' exposure window estimator
If you have been diagnosed with Legionnaires' disease, the commonly cited incubation window is 2 to 10 days. Enter your symptom-onset date to display those dates; this cannot identify a source.
Based on UKHSA Legionnaires’ disease investigation guidance. Your site's risk assessment decides what applies.
This is general information, not a diagnosis or medical advice. If you are unwell, contact a doctor or call NHS 111. Only a clinician can diagnose Legionnaires' disease.
A planning aid to help you and public health think about where to look, not a diagnosis. Sources: NHS, Legionnaires' disease (symptoms), CDC, testing & diagnosis.
"Legionnaires' exposure date estimator." Legionella.io. https://legionella.io/tools/legionnaires-exposure-window/
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