I DONT  KNOW HOW OLD YOUR SON IS EITHER BUT DONT LET THE DOCTOR GIVE YOUR SON THE CHICKEN POX SHOT OR A BOOSTER SHOT WHILE EVER ON PREDNISONE. I JUST HAD THIS HAPPEN TO ME TO HELP PROTECT ME IF MY KID COMES HOME FROM SCHOOL WITH THE POX. WHILE ON PREDNISONE THIS TURNS THIS IN TO A LIVE SHOT AND HE WILL GET THEM IF HE NEVER HAD THEM.

VINNIE