Burden of Invasive Group B Streptococcal (GBS) Disease in Young Infants in China

Inclusion Criteria: 1. Positive culture for GBS from one or more of the following normally sterile sites: blood, cerebrospinal fluid (CSF), pleural fluid, peritoneal fluid, pericardial fluid, surgical aspirate, bone, joint fluid, suprapubic bladder aspiration or internal body site (e.g., lymph node, brain). 2. ≤90 days old at the time of GBS confirmation. 3. Voluntary written informed consent provided. Exclusion Criteria: * None.