Increase in invasive Haemophilus influenzae infections reported across Europe and Cyprus

European health authorities have reported a significant rise in invasive disease caused by the bacterium Haemophilus influenzae, reaching historical highs not seen since 1996. Data from the European Centre for Disease Prevention and Control (ECDC) indicates that 5,856 confirmed cases were recorded across 30 European countries in 2024, compared to 5,520 in 2023 and 4,002 in 2022. Experts attribute the trend to a return to pre-pandemic respiratory infection transmission patterns.

Cyprus has also experienced an upward trend, with 11 confirmed cases in 2024, up from two cases in 2023, three in 2022, and one in 2021. The incidence rate rose from 0.2 to 1.1 cases per 100,000 inhabitants. While this bacterium can lead to severe conditions like pneumonia, meningitis, and sepsis, experts emphasize that the absolute numbers remain small. The infection primarily affects vulnerable groups, including infants and individuals over 65.

Professor of Molecular Virology, Dr. Petros Karayiannis, clarified that the concern stems from the detection of six new bacterial subtypes, as existing childhood vaccines are effective against traditional strains. Health officials strongly urge parents to ensure children complete their standard vaccination schedules, as the disease spreads through respiratory droplets. No immediate cause for alarm exists, but monitoring remains ongoing as seasonal transmission patterns return.