Your task is to predict the verdict of a claim based on the provided question-answer pair evidence. The possible labels are: 'Supported', 'Refuted', 'Not Enough Evidence', 'Conflicting Evidence/Cherrypicking'. Justify your answer using the provided evidence and select the correct label.

Claim: People who are vaccinated against chickenpox need to keep getting boosters.

Q1: How many booster shots are recommended after receiving the initial chickenpox vaccine?
A1: One.
The U.S. Advisory Committee on Immunization Practices recommends two doses of the chickenpox vaccine for most children. The first dose is given around age 1 and the second around ages 4-6. A single dose of the vaccine reduces the risk of chickenpox between 70-90%, and two doses reduce the risk even more.
The chickenpox vaccine was added to the childhood immunization schedule in 1995. The booster dose was added in 2006.
user
justification: Even though 2 doses are recommended, only 1 booster is needed. So this claim about needing to keep getting boosters is not correct. 

verdict: 'Refuted'
assistant