About us


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. 

The UK MS Society, MS Society of Ireland, The MS Society of Canada, Stichting MS Research (Netherlands) and Esclerosis Múltiple Argentina are leaders in the MS International Federation. Together we have committed to increase funding for vital MS research worldwide, and improve access to effective treatment 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. We are stronger when we all run together!

The MS International Federation is the global body for national MS organisations and will be leading the event in the US with the endorsement of its member, The National Multiple Sclerosis Society.

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. Last year you funded more grants that ever before and this year, you can do greater. 

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

Essential Medicines

The World Health Organization (WHO) has a List of Essential Medicines that many countries use as a reference when deciding which treatments they should fund nationally. There has never been a single MS treatment on that list to date. For people living in low to middle-income countries particularly, this makes it very difficult to get treatment, or even to campaign for treatment. MSIF is working with world-renowned experts to try and change this. Your support is driving that work.


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 in Morocco, Uruguay, India and other countries around the world, and help change the world for people who otherwise may never get treatment.

A review of existing medicines 

You are funding the creation of a new system for review of treatments used in other conditions that can be used safely and effectively for MS, so  people with no access to approved treatment will finally have options they can trust.

There is a lack of clinical trials that compare all the different MS medications with each other. One way to compare the different safety and efficacy profiles on the disease-modifying therapies is to review all existing evidence systematically and to use a ‘network meta-analysis’ to compare them.

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, Esclerosis Múltiple Argentina and Stichting MS Research are teaming up with the MS International Federation so the money you raise will be shared to fund local and international projects.

In Ireland 70% of the money you raise will go to MS Ireland projects and 30% will help to fund life-changing research and access to treatment projects around the world.

In the Netherlands 70% of the money you raise will support Stichting MS Research projects and 30% will help to fund life-changing research and access to treatment projects around the world.

In the UK 70% of the money you raise will go to Stop MS and 30% will help to fund life-changing research and access to treatment projects around the world.

In Argentina 70% of the money you raise will got to national projects and 30% will help to fund life-changing research and access to treatment projects around the world.

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.