“BACKGROUND: An outbreak of pertussis in a US elementary school with high vaccination coverage was investigated to evaluate vaccine effectiveness and to identify potential contributing factors.”
Pertussis epidemic despite high levels of vaccination coverage with acellular pertussis vaccine. 2015
“Despite high levels of vaccination coverage, pertussis circulation cannot be controlled at all. The results question the efficacy of the present immunization programmes.”
Effects of diphtheria-tetanus-pertussis or tetanus vaccination on allergies and allergy-related respiratory symptoms among children and adolescents in the United States.
“The odds of having a history of asthma was twice as great among vaccinated subjects than among unvaccinated subjects”
“DTP or tetanus vaccination appears to increase the risk of allergies and related respiratory symptoms in children and adolescents.”