Question: what is the difference between the old shingles vaccine and the new one?
Answer: "When 70- and 80-year-olds get shingles, it can be extremely debilitating," Chen says. By contrast, Zostavax cuts the risk of shingles by only 51% and PHN by 67%. It's only about 38% effective in people over age 70. The effects of Shingrix last longer, too.