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 .
Puppies donât always get their first shots right on schedule. If they are strays, come from backyard breeders, or were owned by someone who didnât know or didnât care, pups easily can get well beyond the optimal age for first shots. As long as the puppy is in good health, he can begin getting his shots at any point.