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


As of 1 June 2021, CERN has implemented a 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 testing campaign at CERN 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 2 - Yellow from 19 July onwards

Our individual contribution to ensuring CERN stays open
Here’s a reminder of the measures that you must apply:

  • Wear your proximeter whenever you are on site;
  • Wear a mask in all shared spaces at all times, unless seated in a cafeteria or restaurant and consuming food or drink;
  • Ensure you respect a physical distance of 1.5 metres;
  • If car sharing, ensure all occupants wear a mask and open the window opposite each occupant for optimal air renewal;
  • Do not move chairs between tables in the cafeterias and restaurants;
  • Avoid social gatherings involving your whole team; follow CERN’s measures and make use of CERN’s self-testing to make any social gatherings as safe as possible.
  • More flexibility in telework
  • As of 29 November, where the needs of the service allow, and in agreement with their supervisors, anyone may telework up to 60%. As a precautionary measure, those in shared offices are strongly encouraged to use this flexibility and telework alternately to avoid being in the office at the same time as colleagues.

COVID vaccination center at CERN

From 9 November, the vaccination centre is open to vaccinate anyone holding a CERN access card and resident in France or Switzerland including family members of CERN personnel, retirees and contractor personnel. All the detailed information can be found under "Vaccination".