The heptavalent pneumococcal conjugate vaccine (PCV7) targets seven of the more than 92 pneumococcal serotypes. Concerns have been raised that non-vaccine serotypes (NVTs) could increase in prevalence and reduce the benefits of vaccination. Indeed, among asymptomatic carriers, the prevalence of NVTs has increased substantially, and consequently, there has been little or no net change in the bacterial carriage prevalence.
This descriptive study, based on national surveillance data of reported malaria cases, travelers’ statistics and data on malaria chemoprophylaxis prescriptions, estimates the incidence and trends of imported malaria in the Netherlands.