How long does immunity from a vaccine last? Here are the results of canine duration of immunity (DOI) studies by Ronald Schultz, PhD.*
The study warns: “The minimum duration of immunity data does not imply that all vaccinated dogs will be immune for the period of time listed, nor does it suggest that immunity may not last longer (e.g. the life of the dog). The percentage of vaccinated animals protected from clinical disease after challenge with canine distemper virus, canine parvovirus and canine adenovirus in the present study was greater than 95%.”
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