In 2023, meningitis claimed an estimated 259,000 lives and affected 2.54 million people globally, with children under the age of five bearing a disproportionate share of the tragedy. While global vaccination campaigns have made significant strides in reducing bacterial meningitis over the last few decades, a new comprehensive analysis reveals that progress has slowed since 2015, leaving the world short of the World Health Organization’s (WHO) 2030 targets for vaccine-preventable disease.
The Shift in Pathogens: From Bacteria to Viruses
The Global Burden of Disease (GBD) 2023 study, published in The Lancet Neurology, provides the most detailed map to date of the 17 pathogens driving meningitis. The findings reveal a complex landscape where the leading causes of death differ from the leading causes of infection.

While Streptococcus pneumoniae, Neisseria meningitidis and various viruses are the primary drivers of mortality, non-polio enteroviruses (NPEVs) are responsible for the highest number of overall cases. This distinction is critical for public health strategy; while vaccines target specific bacteria, viral threats like NPEVs require a different approach focused on robust hygiene education and outbreak preparedness.
Currently, there is no global surveillance network for NPEVs, although regional models in Europe (ENPEN) and the Asia-Pacific (APNES) provide a blueprint for how early detection could be scaled globally to prevent undetected outbreaks.
The WHO identifies four primary vaccine-preventable pathogens of interest: S. Pneumoniae, N. Meningitidis, Haemophilus influenzae, and Group B streptococcus. In 2023, these four pathogens alone contributed to 98,700 deaths and 594,000 cases worldwide.
Neonatal Vulnerability and the GBS Gap
The study highlights a particularly acute window of risk: the early neonatal period. Mortality from Group B streptococcus (GBS) is highest during this stage, yet there is currently no licensed GBS vaccine available to protect newborns.
Current prevention relies on maternal screening and the administration of antibiotics during labor (intrapartum antibiotic prophylaxis). However, this method is not foolproof, as infants may be born before the antibiotics can be effectively administered. Researchers note that maternal GBS vaccines, several of which are currently in development, could provide a more reliable safeguard for newborns.
Beyond the neonatal stage, children under five remain the most vulnerable population, accounting for more than one-third of all meningitis deaths—approximately 86,600 lives lost in 2023 alone. This vulnerability is driven by both biological factors, such as developing immune systems, and behavioral patterns, including frequent hand-to-mouth contact in daycare settings.
In high-burden regions, particularly the African meningitis belt, these risks are compounded by gaps in healthcare access and a lack of low-cost, accurate rapid tests for early diagnosis.
Environmental Risks and Hospital-Acquired Threats
The GBD 2023 analysis connects meningitis mortality to factors that extend beyond the immediate presence of a pathogen. Low birthweight, short gestation, and household air pollution were identified as top factors contributing to meningitis-related deaths.
This suggests that meningitis prevention cannot exist in a vacuum. Reducing the burden may require integration with broader public health initiatives, such as clean air campaigns and improved antenatal care to ensure optimal maternal nutrition and the cessation of smoking and alcohol use to prevent low birthweight.
the study points to the rise of fungal threats, such as Candida spp. Unlike community-acquired bacterial meningitis, these fungal infections often occur in hospital settings, emphasizing the need for stricter infection control to prevent healthcare-associated transmission and the development of new antifungal agents to combat drug-resistant strains.
Understanding the Current Burden
- Who is most affected? Children under 5 and populations in the African meningitis belt.
- What are the primary killers? S. Pneumoniae, N. Meningitidis, and non-polio enteroviruses.
- What is the biggest gap in neonatal care? The lack of a licensed vaccine for Group B streptococcus (GBS).
- What non-medical factors increase risk? Household air pollution and low birthweight.
How can global health systems better integrate environmental protections, like clean air initiatives, into the fight against infectious neurological diseases?




