In connection with the European Immunization Week, ECDC releases data indicating an increase in cases of vaccine-preventable diseases such as measles and pertussis, after decreased levels during the COVID-19 pandemic.
ECDC promotes the performance of external quality assessment (EQA) schemes, in which laboratories are sent simulated clinical specimens or bacterial isolates for testing by routine or reference laboratory methods. EQA schemes, or laboratory proficiency testing, provide information about the accuracy of different characterisation and typing methods as well as antimicrobial susceptibility testing (AST) and the sensitivity of the methods in place to detect a certain pathogen or novel resistance patterns.
This letter to the editor raises the issue of the adaptation of B. pertussis to vaccine selection pressure as one of the reasons for the increase number of cases of whooping cough reported in several countries.
The authors assess the risk of pertussis in children in California relative to the time since the fifth dose of DTaP from 2006 to 2011 (this period included a large outbreak in 2010).