Concomitant administration of pneumococcal and meningococcal vaccines is not only safe but also offers the potential to improve vaccine uptake and reduce the number of doctors’ visits required for routine vaccination, advised Marco Aurelio P. Safadi, MD, PhD, of Santa Casa de São Paulo School of Medical Sciences, Brazil, and associates.
In a post hoc analysis of a phase 3b open-label study, Dr. Safadi and associates sought to evaluate immune response in pneumococcal non-typeable Haemophilus influenzae protein D conjugate vaccine (PHiD-CV) administered concomitantly with either meningococcal serogroup B (4CMenB) vaccine and CRM-conjugated meningococcal serogroup C vaccine (MenC-CRM) or with MenC-CRM alone using reduced schedules in 213 healthy infants aged 83-104 days. Study participants were enrolled and randomized to one of two groups between April 2011 and December 2014 at four sites in Brazil (Vaccine. 2019 Jul 18. doi: 10.1016/j.vaccine.2019.07.021).
Similar immune response was seen with vaccine serotypes and vaccine-related pneumococcal serotypes 6A and 19A in children who had received concomitant administration of PHiD-CV, 4CMenB, and MenC-CRM without 4CMenB.
Dr. Safadi and associates pointed out that PHiD-CV was given in accordance with a 3+1 dosing schedule, while 4CMenB used a reduced 2+1 schedule, which was observed to produce an immune response and provide an acceptable safety profile.
The findings yielded valuable information for the 2+1 PHiD-CV vaccination schedule, which was recently introduced in Brazil, the researchers said. The post-booster results further reflect the “immunogenicity following 3-dose priming.”
The post hoc nature of this study design effectively demonstrated thator with MenC-CRM alone, they explained.
The study was supported by GlaxoSmithKline (GSK) Biologicals. Three authors are employees of the GSK group of companies, and three others received a grant from the GSK companies, two of whom received compensation from other pharmaceutical companies. The institution of one of the authors received clinical trial fees from the GSK companies, and received personal fees/nonfinancial support/grants/other from the GSK companies and many other pharmaceutical companies.