Each year, the Influenza (flu) season results in millions of lost workdays at a cost of billions of dollars. As we all wait for things to get back to normal, it is important not to skip your flu shot this year. It is also important to know, that it takes two weeks for the flu vaccine to become protective. So now is the time to get your shot as the flu season typically runs from November to April. It is also important to understand that the flu vaccine is never 100% effective in preventing the flu. However, the vaccine does substantially reduce your chances of getting the flu and passing it on to others.