Effectiveness of a Meningococcal Group B Vaccine (4CMenB) in Children.

Background: In September 2015, the four-component, protein-based meningococcal serogroup B vaccine (4CMenB; Bexsero) became available for private purchase in Spain.

Methods: We conducted a nationwide matched case-control study to assess the effectiveness of 4CMenB in preventing invasive meningococcal disease in children. The study included all laboratory-confirmed cases of invasive meningococcal disease in children younger than 60 months of age between October 5, 2015, and October 6, 2019, in Spain.

Progression of pregnancy-dependent mouse mammary tumors after long dormancy periods. Involvement of Wnt pathway activation.

Mouse mammary tumor virus (LA) induces pregnancy-dependent mammary tumors that progress toward autonomy. Here we show that in virgin females, pregnancy-dependent tumor transplants are able to remain dormant for up to 300 days. During that period, these tumors synthesize DNA, express high levels of estrogen and progesterone receptors (ER+PR+) and are able to resume growth after hormone stimulation.