Flu shots, or influenza vaccinations, are shots that guard against contracting influenza viruses. While the influenza virus evolves quickly, new vaccine versions are created twice a year. While they vary in efficiency from season to season, the majority offer low to good protection against influenza. According to the Centers for Disease Control and Prevention (CDC) in the United States, influenza vaccination lowers the risk of illness, doctor visits, hospital stays, and fatalities. When immunised workers get the flu, they typically return to work half a day sooner.] The effectiveness of U.S. Influenza Vaccines in those over 65 is still unknown because there is a dearth of high-quality research in this area. Children's vaccines may offer protection to people around them.
