CERN Meyrin site aerial views
A view from 200m (Image: CERN)


As of 1 June 2021, CERN has implemented a new four-level COVID-19 scale, determining conditions for on-site access, telework and other measures that concern CERN members of personnel, contractors and visitors. The overarching objective remains to safeguard the health and safety of everybody on the CERN sites while enabling continued effective operation of the Laboratory.

The level in force at any given time may move up or down the scale. It is determined by the incidence rate in the local area, and a qualitative assessment by CERN taking into account, among other parameters, the number of confirmed cases at CERN, vaccination status in the local area, the stratified testing campaign and the local presence of new variants of the virus.

The presence on site of all categories of personnel and visitors is supported by COVID-19-specific health and safety measures and instructions derived from memoranda by the Director-General.


COVID-19 helpline for support and information: or +41 22 766 7777 from Monday to Friday (8 a.m. - 5 p.m.)

Frequently Asked Questions (FAQ) for CERN personnel, are available on a dedicated page.

Help trace COVID-19: act early! Self-declare/self-evaluate on Tramed

Highlighted updates

Please read through all the sections marked *New-Date* for the most recent changes. Highlighted below are the most important updates.

    Covid-19 level 3 - Orange from 14th of June onwards

    Covid Scale and Measures

    • A new four level Covid scale for CERN determining conditions for on-site access, telework and other measures was implemented on 1 June. The summary table gives an overall vision of the four levels.