Risks of an adverse event following influenza vaccination are far less common than complications related to influenza itself, and the adverse events are generally localised and mild.
Injected trivalent inactivated influenza vaccines are most commonly used throughout the world. Influenza antigen preparation varies between manufacturers.
Between 2 December 2023 and 15 March 2024, highly pathogenic avian influenza (HPAI) A(H5) outbreaks were reported in domestic (227) and wild (414) birds across 26 countries in Europe.
This issue of the ECDC Communicable Disease Threats Report (CDTR) the period 17-23 March 2024 and includes updates on SARS-CoV-2 variant classification, hepatitis A, pertussis, invasive Group A streptococcal infection, chikungunya, dengue, poliomyelitis, western equine encephalitis and cholera.