The Zostavax vaccine was first available in 2006 but is no longer available in the United States. If you received the Zostavax shingles vaccine before 2020, it is still recommended that you get the Shingrix vaccine. That’s because data shows that Shingrix is considerably more effective than Zostavax was when it comes to preventing shingles outbreaks, 90% vs. 51%, and preventing postherpetic neuralgia, 90% vs. 67%.