Katie Ingalls thought her two children were playing together when she heard giggling coming from the bathroom.

Former CDC director Dr. Rochelle Walensky called for stronger, nationwide guidance on infant measles vaccine doses in a new opinion paper published Friday.

Sitting beneath the shade of an orange tree beside her mud-brick hut, Rebecca Blackie cradles her three-week-old baby, desperately trying to soothe his relentless cries. The 30-year-old mother, who ...