Vaccinate the chicks?

[TheBigWRanch]

Quote:
Mareks can travel on your shoes clothing and even tires, so you can still infect your flock without them having direct contact with another chicken.

 

[Sarah4]

I have eggs sitting under a broody hen and my first time hatching out eggs. Do I need to vaccinate the chicks when they hatch? What for if so, the least possible amount I can get away with and how old do they have to be?