descriptive
Strong Support
Scientists compared people who were just barely eligible for the shingles vaccine with those who were just barely ineligible—and found they were equally healthy in other ways, so any differences in health later on can likely be blamed on the vaccine, not other factors.
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Evidence from Studies
Supporting (1)
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Community contributions welcome
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The study checked if people just before and just after the vaccine eligibility age were similar in health before getting the vaccine—and they were. This means the comparison is fair, so the results can be trusted.
Contradicting (0)
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Community contributions welcome
No contradicting evidence found
Gold Standard Evidence Needed
According to GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this specific claim, ordered from strongest to weakest evidence.