The flu gets its name from the virus that causes it, the influenza virus. A flu virus is often passed from child to child through sneezing or coughing. The virus can also live for a short time on surfaces. This includes doorknobs, toys, pens or pencils, keyboards, phones and tablets, and counter tops. Your child can get the flu by touching something that was touched by an infected person, and then touching his or her mouth, nose, or eyes.