"Daddy," Jenifer asked curiously," Why was that hat on the table?" Jenifer was a very young girl about the age of 6, but she had an amazing memory. She remembered a small white hat on the table 4 years ago!

"Jenifer," father replied," Let me tell you a story about my father. Your Grandpa was a very important man famous around the world. He found out a cure for one of the most deadly diseases in the world! It was called, uh, let me think, oh yes yes, LRI which stands for, Lower Respiratory Infections."