A common misconception with the flu is that you need only a few flu shots when you’re young, then you’re set to live a healthy life forever. According to Dr. Karron, a professor at the Johns Hopkins Bloomberg School of Public Health in Baltimore, that is not the case. Unfortunately, the flu virus changes almost every year, and Dr. Karron explains that “the part of the virus that changes is the very part the immune system targets”.
Flu shots only reduce your risk, not eliminate it. Even if some employees find the flu vaccine to be “less effective” over the years, it’s a good bet to take, since vaccinated employees typically have 18%-45% fewer lost workdays and 18%-28% fewer work days with reduced productivity