Parvovirus infection typically presents in dogs aged

• A. 6 weeks to 6 months
• B. Older than 2 years
• C. Under 1 year only
• D. Any age

Answer: (A)

Parvovirus in dogs most often hits those in the youngest age group because they haven’t yet established solid immunity. Puppies receive maternal antibodies through colostrum, which protect them early on, but these antibodies wane over time. As maternal protection declines, usually around 6 to 12 weeks, puppies become susceptible unless they have started and completed their vaccination series. Vaccination schedules for puppies are designed to bridge this gap with initial doses beginning around 6–8 weeks and boosters given thereafter, aiming to protect during this vulnerable window. Because of this pattern, the peak incidence and typical presentation age is roughly from 6 weeks up to 6 months. Older dogs can be affected if vaccination is incomplete or immunity has faded, but the classic presentation window is in young puppies.