The STI Risks Calculator is an educational reference. The choices you make in the calculator, such as country, activity, and history, are processed entirely in your browser. They are never sent to a server, stored remotely, or shared.
With your consent, we use PostHog (hosted in the EU) to measure page-level usage (which pages are viewed) so we can improve the tool. PostHog runs as its own dedicated project for this site. Analytics is strictly page-level: it never captures your calculator inputs. Without your consent, no analytics cookies are stored. PostHog is the only third party that processes any data for this site.
On your first visit a banner lets you accept all cookies or keep only the necessary ones. Analytics cookies are set only after you consent; if you decline or later withdraw consent, those cookies are removed where technically possible. You can change your choice at any time: