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What does my puppy's very first vaccine protect them against?

Updated on September 23rd, 2025

Pet's info: Dog | German Shepherd | Male | unneutered | 2 months and 6 days old | 4 lbs

what does the first vaccine in a dog actually does? what is its work?

1 Answer

Most Helpful Answer

Andrea M. Brodie, DVM

Answered By Andrea M. Brodie, DVM

Veterinarian

Published on December 1st, 2018

The first vaccine at 6 to 8 weeks of age protects the puppy from parvo in case it has no maternal antibodies left. If it has maternal antibodies left in its system, the vaccine will not do anything, however we cannot know whether there are any left or not. So it is a "just in case" protective vaccine.
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