Concerned about the duration of flu shot effectiveness? Understanding how long the flu shot lasts is crucial for maintaining optimal immunity against influenza. Generally, the flu vaccine provides protection for about six months, as the virus strains can change annually. Medical experts recommend getting vaccinated annually to ensure ongoing immunity, especially considering the flu virus's ability to mutate. While the flu shot's effectiveness may diminish over time, it remains a vital tool in preventing severe illness and reducing the risk of flu-related complications. Factors such as age, overall health, and specific strains circulating each season can influence the vaccine's duration. Stay informed about the latest recommendations from healthcare professionals and prioritize annual flu vaccinations to safeguard yourself and those around you. Now, you're well-equipped to navigate the question: "How long does the flu shot last?"