The modified live canine parvovirus (CPV) vaccine was used to vaccinate intranasally twenty-five pups with maternal antibody. The vaccine was able to overcome the interference of maternal immunity in rates of 100%, 72.7% and 17.6% in pups with haemagglutination inhibition antibody titre of 40, 80 and 160 respectively.
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Buonavoglia et al. (1994) studied this question.
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