Last updated 7 January 2021

Self-declaration and auto-evaluation of COVID-19 cases

As of 19 December, you must use the Tramed tool to declare if you are a confirmed or suspected COVID-19 case, or close contact. This is especially true over the holiday period to allow the Medical Service to keep track of the evolution of cases among the CERN community.

If you suspect that you may have come into contact with the virus, the Tramed tool also allows you to evaluate the level of risk you may have been exposed to.

Please take the time to familiarise yourself with the tool, and use it each time you think you may have been exposed – it is there to help the Medical Service effectively manage the situation, to help keep people safe, and to help you.

In case of difficulty please call +41 22 766 7777. 


In case of emergency, call the national emergency numbers (15 in France, 144 in Switzerland).

(ref: Annex 1; ch 1.4c, 1.4d)