human
I've heard that the flu vaccine can cause the flu. What's the truth?
assistant
That’s true, but it’s a very small risk. The flu vaccine is designed to protect you from getting the flu, and there are many different types of flu vaccines. The most common type contains three strains of influenza virus, and each year scientists change which strains are included in the vaccine to match the most likely strains that will be circulating during the upcoming flu season.