Could infecting a diseased person with a variation of the virus help curb the infection? Dr. Louis Pasteur proved that point 135 years ago today! In one of the most successful demonstrations of this theory, the French scientist saved a young child's life on this day on July 6, in 1885. After a rabid dog mauled a nine-year-old boy, Pasteur took a big risk—inoculating him with tissue containing a weakened form of the rabies virus. Pasteur’s series of 13 shots proved to be the first successful human rabies vaccine—as well as a major advancement in vaccine immunology. What can we learn from this? Jack Russo asks Dr. Leonard Hayflick in this special edition to remember this major event in human history and to provide input, comments and recommendations.