Malhotra I, et al. - Researchers here investigated the relation of maternal prenatal infections and newborns’ anti-parasite cytokine profiles with IgG responses to standard vaccination during infancy. As per observations, antenatal sensitization to schistosomiasis or filariasis, and related production of anti-parasite IL-10 at birth were found to be associated with reduced anti-vaccine IgG levels in infancy, with possibly impaired protection.