Streptococcus pneumoniae or pneumococcus (PN) is a major causative agent of bacterial meningitis with high mortality in young infants and elderly people worldwide. The mechanism underlying PN crossing of the blood brain barrier (BBB) and specifically. the role of non-endothelial cells of the neurovascular unit that control the BBB function. remains poorly understood. https://cosmeticssquadets.shop/product-category/nasal-spray/