February 6, 2015   Pediatrician Charles Goodman vaccinates 1 year-old Cameron Fierro with the measles-mumps-rubella vaccine, or MMR vaccine at his practice in Northridge, Calif., Thursday, Jan. 29, 2015. (AP Photo/Damian Dovarganes)     In the face of a growing measles outbreak, President Obama is urging parents to heed modern science and vaccinate their children. […]