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 4 - Red from 10 January

Definitions of quarantine and isolation

The COVID-19 pandemic has brought a lot of new vocabulary into everyday use, including the terms quarantine and self-isolation. You can find in the weekly Covid-19 email a summary about the definitions.

Main changes:

  • all those who can telework should do so, with one day per week on site possible in consultation with supervisors (compared to two days at Level 3 – Orange).  
  • Meetings in person, both indoors and outdoors, should be avoided where possible, and in any case must be limited to a maximum of 15 people.

Mandatory COVID-19 e-learning for access to site
Please note that in Level 4 – Red the e-learning module on CERN’s COVID-19 measures is mandatory. It can be found here.

If you do come on site, 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.

COVID vaccination center at CERN

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".