What is the best advice for a parent with new born before flu season?

I have a new born (4 months) at home and a kid starting her kindergarten this year. Obviously we are concerned about the H1N1 news out there and how bad it is going to get come fall (In USA).

Given this situation what is the best advice i can get to protect my child specially the new born as he is too young and his sister could potentially carry, god knows what, from her school.

Appreciate your inputs and help.