To the left is the people who discovered chicken pox.
Chicken pox rashes had been recorded that they were present from ancient civilizations. Giovanni Filippo was credited with the first description of Varicella. In the 1600's Richard Morton described chicken pox as a mild case of small pox. By 1767 William Heberden made the differentiation between the two poxes, and proved that once you have chicken pox you usually never get it again. In 1888 scientists proved the relationship between chicken pox and shingles. in 1986 the complete DNA sequence of VZV was completed. The chicken pox vaccine was first used in japan in 1988, by 1995 the USA approved this vaccination. By clicking the link below, you can see form US records just how well the vaccination worked, the amount of cases before and after. This describes the evolution in one country, many other countries are the same way the vaccination helped them get past the constant sickness and the epidemic from spreading.