When is the first puppy vaccine typically given?

• A. 4 weeks
• B. 6-8 weeks
• C. 12 weeks
• D. 16 weeks

Answer: (B)

Puppy vaccination timing hinges on when the puppy’s immune system can respond and when maternal antibodies are dropping enough to no longer block that response. The first vaccine is given at 6–8 weeks because this is the window when maternal antibodies have begun to wane, allowing the puppy’s immune system to recognize and respond to the vaccine. Giving a dose earlier, around 4 weeks, often doesn’t produce protection because maternal antibodies can neutralize the vaccine. Waiting until 12 or 16 weeks delays protection and leaves a period where the puppy could be exposed to disease before immunity is established. After that initial shot, follow-up boosters are given every 3–4 weeks until about 16 weeks of age to ensure the immune response is strong and lasting. This creates a reliable foundation of protection as the puppy grows.