Sithi is independent analysis of public data. It is not produced by, affiliated with or endorsed by the NHS, UKHSA or any government body, and it is not medical advice. For health concerns use NHS 111 online or call 111.

Press

Press and media

The Sithi Illness Index is an experimental weekly measure of winter illness in the UK, published every Tuesday at 10:00 UK time. These are the materials most often needed for a report.

Latest figure

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Chart

The chart is redrawn at each release. It may be reproduced with the credit "Sithi Illness Index, sithi.net".

Data and method

Full weekly history (CSV), including each input.
Latest release (JSON).
Methods: questions, weighting, sample sizes, margins of error and back-test results.
Corrections and changes.

Describing the index

Suggested wording: "the Sithi Illness Index, an independent experimental measure published by Sithi, which combines a weekly household survey with search data and UKHSA surveillance". Please do not describe it as official or government data. 100 means a typical winter week.

Who runs it

Sithi is a trading name of Neurithmetic Ltd, registered in England & Wales no. 15177502. Registered office: The Courtyard, Shoreham Road, Upper Beeding, Steyning, West Sussex, BN44 3TN. Sithi is independent analysis of public data. It is not produced by, affiliated with or endorsed by the NHS, UKHSA or any government body, and it is not medical advice. For health concerns use NHS 111 online or call 111.

Contact

Sithi editor, hello@sithi.net. We aim to reply within one working day. We cannot comment on individual health concerns.