Invasive meningococcal disease rebound in older adults post-COVID-19 pandemic: A targeted literature and surveillance review

OBJECTIVES: Invasive meningococcal disease (IMD), caused by Neisseria meningitidis, remains a significant public health concern due to its rapid progression, high case fatality rate (CFR), and evolving epidemiology. Recent trends suggest a demographic shift toward older adults. This review examined post-COVID-19 changes in IMD epidemiology among adults aged ≥65 years, including regional variations, serogroup distribution, and mortality. METHODS: A targeted literature review was conducted using OVID (Embase, MEDLINE) following PICOS-T criteria, including full-text English-language studies published between January 2021 and June 2024, supplemented by surveillance reports. RESULTS: Of 1639 records screened, four peer-reviewed publications and ten surveillance reports met inclusion criteria. During the COVID-19 pandemic, IMD incidence declined sharply across all age groups, including older adults. Post-pandemic data indicate a re-emergence of IMD among older populations, with incidence in several regions returning to or exceeding pre-pandemic levels by 2023. Across multiple locations, serogroup Y emerged as the dominant or increasingly prevalent serogroup among older adults. CFR varied by region and serogroup and consistently remained high in this age group. CONCLUSION: These findings demonstrate the re-emergence of IMD among older adults and highlight the need for strengthened IMD surveillance and serogroup monitoring in this population, to guide prevention strategies and inform public health policy.