Try the Level Four Challenge! Try the Level Three Challenge! Try the Level Two Challenge! Try the Level One Challenge!


Our virtual lab has four levels: 1 is easiest,
4 hardest. You need to pass a challenge to
advance to the next level.

Challenge subjects: To enter level...
1: WHY STUDY INFECTIOUS DISEASES?
2: IS THE RISK OF DISEASE INCREASING?
3. HOW DO WE CHARACTERIZE DISEASES?
4. WHAT ARE THE BARRIERS TO DISEASE?

Start at the top, with level 1... or choose
any level to advance immediately to its
challenge.