Mummies with babies who has CHD (congenital heart defect), how to boost immune system? My 17 mth old falls sick almost every wk and its affecting my job terribly. He is in IFC and on regular follow up checks in KK. Feeds on bm and fm and homecooked food. Do you give LO supplements? Is there a need to change centres? His 4 mth old sibling is in the same sch, same class but never got sick. Thanks!