Marshfield Clinic Research Foundation

This study compared two types of flu vaccines—one made using eggs and one not—to see which triggers a stronger immune response in adults aged 18 to 64. Researchers followed 366 participants over two flu seasons to measure antibody levels. The goal was to understand if egg-based v…

This study looked at how well different licensed flu vaccines work in adults aged 65 to 74. About 179 participants received one of three vaccines over two flu seasons, with blood tests to measure immune response. The goal was to see which vaccine provides the best protection in t…