Pediatricians object to ad that advises asking questions about flu shots
                                
                                
                                    (Newser) -
                                    Delta Airlines has announced that it will change its approval process for in-flight ads, after a PSA from the National Vaccine Information Center, a group that is often critical of vaccines, caused an uproar, the  Atlanta Journal Constitution  reports. The  ad , which will keep running through the end of November...