Add prebiotics in babies diet that will help over all development of baby I was suggested aptamil formula milk which contains prebiotics in it by my pediatrician that helped me

Immunity develops over time . For babies make sure you keep them away from people who are sick or have any contagious illness . Timely vaccination is important.

Breastfeeding is the best way go boost immunity.. If not possible use a formula with prebiotics

For newborns, consider breastfeeding · 2. Promote regular hand washing · 3. Don't skip immunizations · 4. Make sleep a priority · 5. Encourage a healthy diet to the mom. For Infants an d Toddlers 1. Serve more fruits and vegetables. · 2. Boost sleep time. · 3. Breastfeed your baby. · 4. Exercise as a family. · 5. Guard against germ spread. I hope this helps