Public-health experts are stressing that the virus still is around and could contribute to a more-complicated cold and flu season. And they’re quick to mention that one of those illnesses can be prevented with a shot or nasal spray. It’s always important for kids to get their flu shot. Flu killed 107 children in the United States last year, according to the federal Centers for Disease Control and Prevention, which recommends annual vaccination for almost everyone 6 months or older. This year, health officials are emphasizing that parents should choose the nasal vaccine, which is made from a live virus, over the shot if their children are 2 to 8 years old because it provides better protection. How to protect your child.