� Polio loomed over the early part of the 20th century � Polio was asymptomatic up to 99% of the time � Polio caused paralysis, and struck often in the summer months � "Iron lung" breathing-machines kept sufferers alive � A vaccine was developed 50 years ago � Polio is on the verge of extinction GIANTmicrobes(R) Original (5-7" plush doll) $9.95 GIANTmicrobes(R) Petri Dish (3 mini microbes) $14.95

Hepatitis (Hepatitis C Virus) HIV (Human Immunodeficiency Virus) Polio (Poliovirus) TB (Tuberculosis)