Brazil Approves New Composition for Seasonal Influenza Vaccines

Anvisa

Annual influenza vaccination is one of the most effective strategies for preventing respiratory complications and reducing hospitalizations caused by the flu virus. Each year, the vaccine composition must be updated based on the most recent circulating strains. In 2025, ANVISA approved a new regulation defining the composition of seasonal influenza vaccines to be used in Brazil, aligning the country with World Health Organization (WHO) recommendations.