A positive or reactive HBsAb (or anti-HBs) test result indicates that a person has successfully responded to the hepatitis B vaccine or has recovered from an acute hepatitis B infection. This result means that you are immune to future hepatitis B infection and you are not contagious.
A puppy should have their first shots when they are 6 weeks. I prefer giving my pups shots early at 4-5 weeks of age just in case you are in high risk area for catching parvo then follow up shots every 3 weeks after til 12 - 15 weeks of age .
Expect your puppy to receive at least three of four core vaccines -- those recommended for all dogs -- in his first round: distemper, parvovirus and hepatitis. Your vet may prefer to give just a parvovirus vaccination as early as 5 weeks old, then a second dose with his other two core injections a week or two later.