Not blood, but an Electrician to restore the current between people who do not speak to each other anymore.
An Optician, to change the outlook of people.
An Artist, to draw a smile on everyone's face.
A Constructor, to build a bridge between neighbors.
A Gardener, to cultivate good thoughts.
And last but not least a Mathematician, for all of us to relearn how to add love and sympathy to our relations.