Meningococcal infection

This phase 3 study tests an investigational meningococcal conjugate vaccine in healthy infants and toddlers aged 2 to 23 months in China. The vaccine targets four serogroups of meningococcal bacteria (A, C, W, Y) that can cause meningitis and bloodstream infections. Researchers c…

This early-stage trial is testing a new vaccine designed to protect against several types of meningococcal bacteria, which can cause meningitis and bloodstream infections. Researchers will enroll 150 healthy people aged 2 to 59 to check the vaccine's safety and how well it trigge…

This study follows 180 children who received a meningitis vaccine (ACYW135 conjugate) years ago to see if their immune protection lasts. Researchers will measure antibody levels in blood samples taken 3 and 5 years after vaccination. The goal is to understand how long immunity pe…

This study will recruit 100 sexual partners of people diagnosed with gonorrhea. Researchers will take an extra throat swab to analyze all the bacteria and their genes using a technique called metagenomics. The goal is to find hidden infections, antibiotic resistance, and see how …