The city's public health planners built a flu prevention outreach activity around the word "whack" for its high-energy, cartoonish appeal for kids and because it offers a mnemonic device that teaches students good hand hygiene habits:
· W, wash your hands often
· H, home is where you stay when you're sick
· A, avoid touching your eyes, nose, and mouth
· C, cover your coughs and sneezes, and
· K, keep your distance from people who are coughing or sneezing