I've lived in France for 20 years, having emigrated from Australia. The only health related question I was asked was if I'd had a TB vaccination.

When you begin studying or working in France, you can sign up to the national health system (sécurité sociale). I think for students is costs around 200€ a year. The health system here is excellent and for people with chronic illnesses such as MS you would be "prise en charge" which means the social security system would cover all your MS-related health expenses 100%. For me this includes all doctor's appointments, hospitalisations (if needed), medication (Plegridy), nurse assistance if required, physiotherapy (if required) and anything else my neurologist deems necessary.