<P> The chickenpox vaccine first became commercially available in 1984 . It is on the World Health Organization 's List of Essential Medicines , the most effective and safe medicines needed in a health system . In the United States it costs between 100 and 200 USD . </P>
<P> The chickenpox vaccine first became commercially available in 1984 . It is on the World Health Organization 's List of Essential Medicines , the most effective and safe medicines needed in a health system . In the United States it costs between 100 and 200 USD . </P>
when did the chicken pox vaccine become available in the united states
when did the chicken pox vaccine become available in the united states
1984
1984