Pandemic flu spreads the same way as other kinds of flu:
When people who have the flu speak, cough or sneeze, they spray tiny droplets in the air. If other people breathe in these droplets, or if the droplets land in their eyes, they can catch the flu.
When a person with the flu touches their eyes, mouth or nose, then touches another person (for example, by shaking hands), they can pass along flu germs. If you have flu germs on your hands and you touch your eyes, nose or mouth, you can get infected with the flu.
If a person with the flu coughs or sneezes on something (a tissue, a door handle), and you touch that thing, then touch your eyes, nose or mouth, you can get infected with the flu.