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 .
Expert: Tammy F. replied 9 years ago. If your dogs received three rounds of vaccines as puppies (around 8 weeks, 11 weeks and 16 weeks of age), they are somewhat protected until one year of age.