Looks good. How high are your walls? (It looks like it might be a bit fiddly in moving miniatures around in the hallway, etc.)
The walls aren't too tall, as you mentioned I don't want them colliding with fingers etc
Nice job.
Did you get a size for the posters?
Not from another member, but I did look at the CDC website and other Health Authorities and you can download posters direct from them and they use 'A' sizing, so if we took a large printable size of A0 that's 1189mm x 841mm which would equate too 247mm x 175mm (2.5cm x 1.7cm) for a scale 1:48 game.
Here's all the A size measurements for reference:
http://www.papersizes.org/a-paper-sizes.htm