an emergent question --Could I accept the vaccination ?

[iiyama]

My liver's fuction is good and HBsAb is negative. My doctor suggested me to accept the vaccination . But my friend told me that HBsAg should be also checked, when HBsAg was checked after I had my breakfast,it was positive. Then my doctor wanted to see the result of HBcAb and told me that if this one is negative,I can still accept the vaccination.
Now I have two questions:
1. Has the breakfast that I had affected the result of  
   checking ? Or it has no nothing to do with the result ?
2. When my result is
   HBsAg +
   HBsAb -
   HBeAg -
   HBeAb -
   HBcAb -
   Could I accept the vaccination ?
   If I accept,is there any good or bad influence?

Thanks a lot!