The MS Trust have just issued this: https://mstrust.org.uk/news/covid-19-vaccines-what-they-mean-people-ms?bblinkid=245407693&bbemailid=25965651&bbejrid=1733139404 It's a well considered and thorough look at the potential for vaccines, answering many questions which affect us with MS. It's written by Professor Alasdair Coles from Addenbrookes in Cambridge. He was the Campath/Lemtrada pioneer and is brilliant.
It looks like most of us will be able to take a vaccine. He says that people with MS on immunosuppressive drugs and those with significant disability will be likely to be in the second wave of vaccinations - hopefully before Easter. There are some people who may have different responses to vaccines - some DMDs make vaccines ineffective (he's talking about Ocrevus and Lemtrada - but you need to read the report to see what this means for you if you're on one of these.)
So, good news.