When was the chickenpox vaccine introduced in the united states?
Japan was among the first countries to vaccinate for chickenpox. The vaccine was first licensed in the United States in 1995. Routine vaccination against varicella zoster virus is also performed in the United States, and the incidence of chickenpox has been dramatically reduced there (from four million cases per year in the pre-vaccine era to approximately 400,000 cases per year ). In Europe, most countries do not vaccinate against varicella, though the vaccine is gaining wider acceptance. Australia, Canada, and other countries have adopted recommendations for routine immunization of children and susceptible adults against chickenpox.
When was the chickenpox varicella vaccine introduced in the united states?
1995
Varicella vaccine
Several companies supply MMRV vaccines. ProQuad is marketed by Merck and was approved in 2005, for use in the United States by the Food and Drug Administration (FDA) for children ages twelve months through twelve years. An MMRV vaccine called Priorix Tetra by GlaxoSmithKline has been approved in Germany and Australia.
When was the chickenpox combined MMRV vaccine introduced in the united states?
2005
MMRV vaccine
Varicella vaccine
https://en.wikipedia.org/wiki/Varicella%20vaccine
MMR vaccine
https://en.wikipedia.org/wiki/MMR%20vaccine
Zoster vaccine
https://en.wikipedia.org/wiki/Zoster%20vaccine
MMRV vaccine
https://en.wikipedia.org/wiki/MMRV%20vaccine
Varicella vaccine, also known as chickenpox vaccine, is a vaccine that protects against chickenpox.[8] One dose of vaccine prevents 95% of moderate disease and 100% of severe disease.[9] Two doses of vaccine are more effective than one.
Varicella vaccine
The MMRV vaccine combines the attenuated virus MMR (measles, mumps, rubella) vaccine with the addition of the chickenpox vaccine or varicella vaccine (V stands for varicella). 

The MMRV vaccine is typically given to children between one and two years of age. Several companies supply MMRV vaccines. ProQuad is marketed by Merck and was approved in 2005, for use in the United States by the Food and Drug Administration (FDA) for children ages twelve months through twelve years.
MMRV vaccine
Varicella vaccine is a vaccine that protects against chickenpox, where one dose of vaccine prevents 95% of moderate disease and 100% of severe disease and two doses of vaccine are more effective than one. The vaccine was first introduced in the United States in 1995. The MMRV vaccine combines the attenuated virus MMR vaccine, which is for measles, mumps, and rubella, with the addition of the varicella vaccine. It was approved in 2005, for use in the United States by the Food and Drug Administration for children ages twelve months through twelve years and is typically given to children between one and two years of age.