Pertussis Resurgence: A Growing Concern
A young boy (18 months) with a nasty cough, trying to catch his breath.
getty
Pertussis, commonly known as whooping cough, has seen a concerning surge this year, especially during the back-to-school season. Recent cases in Frostburg, Maryland, involving students and their households, highlight the growing threat of this infectious disease.
Trends in pertussis cases 1922-2022
CDC.gov
Cyclical waves of pertussis infections have been observed over the years. The Centers for Disease Control and Prevention (CDC) reported a significant increase in cases this year, with over 17,000 cases reported as of October 5, 2024, compared to the same period in 2023.
The decline in respiratory diseases during the COVID-19 pandemic, attributed to social isolation and masking, has now led to a resurgence of infections as people ease up on protective measures.
Dr. Paul Offit, a virologist and director of the Vaccine Education Center at the Children’s Hospital of Philadelphia, highlighted the evolution of pertussis vaccines over the years. The shift to acellular vaccines in 1991 aimed to improve safety, albeit requiring multiple boosters for sustained immunity.
Despite vaccination efforts, pertussis remains a challenge due to its infectious nature and potential misdiagnosis. Immune protection from vaccines diminishes over time, necessitating periodic boosters to maintain effectiveness.
Vaccination rates in Maryland have shown improvement, but regional disparities persist. The practice of cocooning, once recommended to protect newborns from pertussis, has been revised in favor of vaccinating pregnant women with Tdap for enhanced immunity transfer to infants.
An expert panel in 2022 discussed changes in pertussis epidemiology and vaccine strategies, emphasizing the need for improved vaccines for adults and older children. Ongoing research into live attenuated vaccines like BPZE1 offers promise for enhanced immunity against pertussis.
As we await advancements in vaccine technology, administering Tdap at 10-year intervals remains a prudent choice for adults. Continued research and vaccination efforts are crucial in combating the resurgence of pertussis and protecting vulnerable populations.
