There are many different flu viruses and they are constantly changing. The composition of U.S. flu vaccines is reviewed annually and updated as needed to match circulating flu viruses. Flu vaccines protect against the three or four viruses (depending on the vaccine) that research suggests will be most common. The best way to prevent seasonal flu is to get vaccinated every year. CDC recommends a yearly flu vaccine as the first and most important step in protecting against influenza and its potentially serious complications. The exact timing and duration of flu seasons can vary, but influenza activity often begins to increase in October. Most of the time flu activity peaks between December and February, although activity can last as late as May. Schedule an appointment with us today and get your flu vaccine by calling (386) 774-0016.