This topic and Dr Bienen’s training as a veterinarian make me think of my hobby for the past 35 years, breeding and showing dogs.

We are instructed by our veterinarians that we are not to start immunizing our puppies until the mother’s protective immunity has waned after the weaning process. The first DHPP vaccine is typically given at 8, 12 and 16 weeks so that we can be sure to “hit” a good window of opportunity to create maximum protective effect for the growing dog, and to allow time for the immune system to mature adequately so the vaccine can be effective.

This is certainly different than the recommendations for human babies, breastfed or not. I look forward to following this research as it continues.