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How many years is the Shingrix shingles vaccine effective for if given in 2018, and what is its efficacy rate?

The Shingrix vaccine is effective for more than 90% of people four years after receiving the injection. Studies have shown that this effectiveness can last up to 9 years in some cases. Research is currently being conducted to determine if a second dose of the vaccine is necessary or beneficial. In the meantime, it is recommended to ensure that you have received both injections.