Hi, Welcome to HealthcareMagic Forum.
Having Less Breast Milk or Less Breast Feeds is not a Predisposing Factor for any disease. Don't worry about that. You may want to speak to your Doctor and ask for Galactogogues which increase the Breast Milk Production. Your Doctor is Talking about Meningococcal and Pneumococcal Vaccination
which are Optional Vaccines which are suggested in Special Circumstances and even if you don't get your Kid vaccinated with these there wont be any problem but if you want, you can get her vaccinated for extra protection against these diseases.