@lanejudy, I do not know the specifics of this group, but it is indeed broad. People with mental challenges is maybe a better word. On the news I also saw someone with autism who lived in a facility getting vaccinated. It is definitely not just down syndrome. I wouldnt be surprised when people with anorexia for example are also part of this priority group when living in a facility.
I think for some the reason to get the vaccin is just the living together, for others there is a second reason because of underlying conditions. In total there about 230k people in NL with this priority.
I also read it has to do with this group not being able to see their families. Either them going home for visits or families going to the facility.
Just to be clear, the vaccination is only for adults.