Via this website, you can register for research on ME/CFS and other post-acute infection syndromes (PAIS). If you live in one of our regions, you will receive a questionnaire about your health and symptoms within a few months.

Based on your answers, we will assess whether participation currently meets the study’s eligibility criteria. These criteria are necessary to ensure that the research is conducted carefully and consistently.

If participation is possible, we will contact you. You always decide for yourself whether you still wish to take part.

It is also possible that your information does not currently match the criteria of the ongoing study. If so, we will inform you. This does not diminish the value of your registration, and you may still be invited at a later time.

In the sections below, you will find information about the different topics listed in the headers. When you click on a header, it will expand and display the information you are looking for. To close the menu, simply click on the header again. If anything is unclear, please feel free to contact us or visit the “Frequently Asked Questions” (FAQ) section.

  • residents of the Netherlands who are fluent in Dutch
  • between 18-65 years old
  • not pregnant or breastfeeding in the past 12 months
  • diagnosed with ME/CFS, Long COVID, Q-fever, Lyme disease, or Multiple sclerosis
  • no other serious medical conditions
  • No medication that suppresses your immune response
  • healthy people without serious medical conditions as a control group

Step 0: Register

Step 1: A first survey to see if you fulfil all criteria

Step 2: If yes, a survey regarding your specific symptoms

Step 3: Online meeting

Step 4: Confirm with your GP

Step 5: In-person visit

Step 6: Surveys

Currently, we only recruit participants who live within 50 km of the Amsterdam UMC and are able to visit in person. Other areas of the Netherlands and homebound participants will follow at a later date.


Want to participate?

Register that you’re interested and you will be contacted when we start recruiting from your area.

NB: opens in a new window. The registration form is only available in Dutch.

Important: By submitting the form below, you indicate that you are interested in participating in the NMCB and you agree that NMCB will contact you for further information about possible participation. However, you are not obliged to participate. Your email address will be used solely to notify you when recruitment begins and to provide additional details on how to become involved in the study.