Tonie,
I would like to see one more pass at this if you would. I would like to see the primary character form wearing a nurse hat (example link in previous comment) - and I would like to see the type a little more balanced with the icon. The balance on the size of #5 is a little better, the icon doesn't overpower the text.
Something else that I think would bring everything together would be a (semi-transparent, or maybe trasnparent on bottom, and getting more opaque towards the top) is a sphere in the middle of the group holding hands - so it looks like they are holding hands around the world. Maybe either a solid shape, or something simple with some subtle latitude and longitude designs.
The color scheme on
#20 is great, too!
Thanks
Tabor