The flu vaccine is a shot that helps protect you from the influenza virus, which causes the flu. Getting vaccinated can reduce your chances of getting sick and can also lessen the severity of symptoms if you do catch the virus. It's especially important for vulnerable groups, like the elderly and those with chronic health conditions, to get the vaccine each year. The flu vaccine is updated annually to match the most common strains of the virus. You can usually get it at your doctor's office, pharmacies, or community health clinics. By getting vaccinated, you not only protect yourself but also help keep your community healthy.