What is thimerosal, does it have side effects and why is RFK Jr. removing the controversial preservative from the flu shot?

The United States will stop distributing all influenza vaccines that contain mercury-based preservative thimerosal, marking ...

Novavax reports strong immune responses from H5N1 avian flu vaccine candidate, showing promise in single and two-dose ...

Stephanie and Ian Campbell were "naive" about the impacts of Influenza B until their daughter was fighting for her life. They ...

The 2024-2025 flu shot has an estimated efficiency rate of 32%-60% against influenza and 63-78% against influenza-associated hospitalization among children and adolescents, according to data ...

ABC News medical contributor Dr. Alok Patel discusses the vaccine changes approved by Health and Human Services Secretary ...