According to the World Health Organization, the average life expectancy at birth in Nigeria increased from 47.19 in year 2000 to 53.41 in 2015.  This improvement might appear significant but, when you compare this with what obtains in some countries like Canada where average life expectancy at birth as at 2015 was 84.13 and Japan with average life expectancy of 86.87 as at 2015 also, you will certainly agree with me that there is still so much that we need to do in this part of the world. Over the years, it has been observed that effective vaccines and medicines have helped fight diseases that could otherwise cut a person’s life short. According to the Center for Disease Control and Prevention (CDC), science has helped extend the average person’s life span by nearly three decades during the last century. As at today, there are several research findings and some still ongoing in the aspect of longevity. In fact, scientists now believe that it is possible to actually stop pe...