"Despite historical predictions that infectious diseases would wane, new infectious diseases are emerging and old enemies have reappeared and are challenging our defenses. The battle against infectious diseases, once thought to have been won, has only just begun. By understanding the interaction between humans and microbes, we can effectively combat these often deadly attacks. Just how vulnerable are we? What are the lessons learned from the past? How can we protect ourselves before the next epidemic strikes?" From a 2001 exhibit at The College of Physicians of Philadelphia.