Researchers at Texas Biomedical Research Institute are developing a new type of flu vaccine that could provide protection for several years, rather than just one season. Currently, the reason for yearly flu shots is due to the rapid evolution of the virus. The new approach focuses on identifying parts of the flu virus that don't change significantly, allowing for longer-lasting protection. If successful, this could mean people only need to have a flu shot every few years instead of annually. The research is still ongoing but scientists are moving towards animal trials and potentially clinical trials.