«This study demonstrates that despite high rates of Tdap vaccination, the growing number of adolescents who have received only the newer acellular pertussis vaccines continue to be at higher risk of contracting whooping cough and sustaining epidemics,» said lead author Nicola Klein, MD, PhD, co-director of the Kaiser Permanente Vaccine Study Center. (sciencedaily.com)
One big reason is that even though they receive the diphtheria, tetanus, and acellular pertussis vaccine (DTaP), it isn't until they get the 3rd dose when they are six months old that they are protected against whooping cough as infants. (verywellfamily.com)
There was little evidence that switching from the cellular to the acellular pertussis vaccine had a significant effect on the spread of pertussis in Massachusetts. (aaas.org)