Trivalent vs Quadrivalent Flu Vaccine: Understanding the Difference for the 2026 Influenza Season
Understanding Influenza Vaccines Influenza vaccines are updated regularly because influenza viruses constantly evolve. Each year, global health authorities analyze circulating influenza strains and recommend vaccine formulations designed to provide protection against the most relevant viruses. For the 2026 influenza vaccination season, the World Health Organization has issued updated guidance on the composition of influenza […]