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Privacy Policy

Last updated: March 2026

This privacy policy describes how the Leiden Cell Observatory (LCO) website collects and processes information when you visit leiden-cell-observatory.github.io.

Who we are

The Leiden Cell Observatory is a shared research infrastructure of Leiden University, operated jointly by the Leiden Academic Centre for Drug Research (LACDR), the Institute of Biology Leiden (IBL), and the Leiden Institute of Chemistry (LIC).

Contact: cellobservatory@biology.leidenuniv.nl

Website analytics

We use Umami Analytics to help us understand how visitors interact with our website so we can improve our content and services.

What Umami does

Umami is a privacy-focused, open-source analytics tool. It is designed to be a less privacy-invasive alternative to tools such as Google Analytics.

  • No cookies are used. Umami does not place any cookies in your browser.
  • No cross-site tracking. Your activity on this website is not linked to your activity on any other website.
  • No personal profiles are built.

Data processed

When you visit a page on this website, Umami may process the following data:

Data Purpose
Anonymised/hashed IP address To estimate general geographic location (country level) and to de-duplicate page visits within a session. The raw IP address is never stored.
Browser type and version To understand which browsers our visitors use
Operating system To ensure cross-platform compatibility
Device type To optimise the layout for desktop, tablet, and mobile
Referring URL To understand how visitors find our website
Pages visited and time on page To understand which content is most useful

What we do not collect

  • Name, e-mail address, or any other directly identifying information
  • Precise location data
  • Persistent identifiers or fingerprints that follow you across sessions or websites

We process the above data under Legitimate Interest (Article 6(1)(f) GDPR). Our legitimate interest is the need to maintain and improve a publicly accessible scientific resource. Because Umami does not use cookies, does not track individuals across websites, and anonymises IP addresses, this use of analytics has minimal privacy impact.

You have the right to object to this processing. However, as Umami does not store persistent identifiers, we are generally unable to identify specific users in order to exclude them from aggregated statistics.

Data retention

Aggregated and anonymised analytics data is retained for up to 24 months. Because no personal data is stored in identifiable form, there is nothing to delete on an individual basis.

Data processor

Umami Analytics is self-hosted. All data is processed on infrastructure controlled by Leiden University and does not leave Leiden University systems.

Hosting

This website is hosted on GitHub Pages (GitHub, Inc., a subsidiary of Microsoft). When you visit the site, GitHub processes your IP address to deliver the requested content. This processing is necessary for the technical operation of the website.

GitHub Pages is a US-based service. Visiting this website therefore involves a transfer of data to a third country outside the European Economic Area (EEA). GitHub participates in the EU-U.S. Data Privacy Framework and provides appropriate safeguards under Article 46 GDPR. For more details, please see the GitHub Privacy Statement.

Your rights under GDPR

Under the GDPR, you have rights including access, rectification, and erasure of your personal data. Because our analytics setup is designed to be anonymous and does not store identifiable data, we are typically unable to link specific analytics data to an individual user.

If you wish to exercise your rights or have questions or concerns, please contact us. Please note we may require additional information to identify which data (if any) pertains to you.

cellobservatory@biology.leidenuniv.nl

Changes to this policy

We may update this policy periodically. The "last updated" date at the top of this page will reflect any changes.

License

All other content on this website is licensed under the Creative Commons Attribution 4.0 International License.