Hi Mam...all formula milk is NOT good for baby as they don't help in brain growth, intelligence and resistance to infection...Breast feeding has numerous advantages including protection from infection, allergies and cancer. It also improves body growth and brain growth, IQ of babies. Also avoid bottle feeding as it may cause diarrhea , teeth problem...use spoon and cup to give formula milk IF no breast milk ...to my knowledge there no relationship of lactogen and rota virus or pcv vaccine ...all vaccines can be give even when you are taking formula milk