Meritain Health on Instagram: "It’s influenza vaccination week—Get your flu shot! In honor of influenza vaccination week, we are going to share some information about the basics of the flu shot and reasons why you should get yours, if you haven’t already! Whether you’re used to getting your flu shot every year or have never had one, it helps to know a few basics. An influenza vaccine, commonly called a “flu shot,” is a vaccine to protect you against the four influenza viruses research indicates