I had the Astra zeneca vaccine and as part of the MS dream trial I had a blood test 4 weeks after my 2nd dose to see if having MS affects the vaccine. I had a letter yesterday confirming that I have NO antibodies to covid19. I have called the team and arranged for another blood test on the 27th and I awaiting for my gp to call me back to discuss how this affects me as I am a shielder. I'm confused and bewildered. Is it just me or all MSers? Until we know I'd advise you all to keep your masks on