A new report from the World Health Organization (WHO) and the London School of Hygiene & Tropical Medicine (LSHTM) reveals the alarming global impact of Group B streptococcus (GBS) – a common bacterium that can be transmitted in the womb, during birth, or in the early weeks of life – leading to around 150,000 deaths of babies each year, more than half a million preterm births and significant long-term disability.