There are over 2.8 million people around the world living with MS and in every country, life is different. At the MS International Federation, it’s our mission to leave MS where it belongs, behind us. 

DMSG (Germany), Stichting MS Research (Netherlands), the UK MS Society, and MS Ireland are leaders in the MS International Federation. Together we have committed to increase funding for vital MS research worldwide,  improve access to effective treatment and support for everyone – no matter where they live. The May 50K is one of the most important ways we can help achieve those goals, so the only thing we leave behind us is our limits.

Working together helps fund international collaborations that can speed up research and reduce duplication of effort. Be part of a faster, more connected world of research!

When we work together we take the fight for access to affordable treatments to the global level.

Every step you take also helps provide better support for people living with MS around the world, including many in very challenging situations.

We are stronger when we all run together!

Let’s leave MS behind

Many incredible based researchers are already funded by The May 50K members. Not only will taking part in The May 50K help continue that work, it will also fund incredible international research collaborations like The Global Patient Reported Outcomes in MS (PROMS), an initiative which aims to develop a global, unified view on PROs to enhance their use and impact in MS research and healthcare. You will also fund national research in your country whilst funding grants to young researchers around the world.  

Register today as an individual, a social team or a workplace team.

Essential Medicines

In August 2023, the World Health Organization (WHO) added three disease modifying-therapies (DMTs) for multiple sclerosis (MS) onto its Essential Medicines List for the first time. The WHO’s Essential Medicines List is an internationally recognised set of selected medicines to help countries choose how to treat their priority health needs.

With this pivotal decision, the WHO acknowledged the critical importance of making MS treatments available in all health systems at all times. It was a significant moment in the history of MS, marking a crucial step towards improving access to MS treatments for people living with MS, particularly those in low- and middle-income countries or low-resource settings. Your support helped make change happen.


There is no country in the world where access to effective MS treatment is perfect, but in many low to middle income countries people often have little to no treatment at-all. Taking part in The May 50K will help people around the world who don't enjoy the same vital support that is taken for granted elsewhere, and help change the world for people who otherwise may never get treatment.

The International Progressive MS Alliance

The International Progressive MS Alliance is one of the most important global collaborations in the history of MS. Its funding of cutting-edge scientific research is beginning to show progress that many people living with progressive MS had long thought hopeless. For example, it recently announced that it may be possible to measure and even predict what the disease is doing with a simple blood test. If that is right, it could be a game-changer.

Partnering with National MS Charities

MS Ireland, The UK MS Society, DMSG (Germany), and Stichting MS Research (Netherlands) are teaming up with the MS International Federation so the money you raise will be shared to fund local and international projects.

If you are in one of those countries, 70% of the money you raise will fund their projects and 30% will help to fund life-changing research, access to treatment and support projects around the world.

In every other country your support will help fund the work of the MS International Federation, which supports MS organisations and people affected by MS around the world. 

Wherever you're from thank you for being part of this amazing fundraising commmunity!

The MS International Federation

We bring together MS organisations from around the world to help everyone affected by MS. We support international MS research, strengthen MS organisations in countries where there is little support for people with MS, campaign for increased awareness of the disease, and work to improve access to treatment for everyone.

Leave your limits behind

We know you’ve got it in you to go the extra kilometre and be an active part of the change this May.