This isn't mentioned in the article, but the UK at least was only declared to have eradicated measles in 2017 - it was a very short-lived "eradication" that mig

This isn't mentioned in the article, but the UK at least was only declared to have eradicated measles in 2017 - it was a very short-lived "eradication" that might just have been based on a temporary drop in the number of measles cases (they went up again quite substantially in 2017-2018): https://publichealthmatters.blog.gov.uk/2019/08/19/measles-in-england/ https://publichealthmatters.blog.gov.uk/2019/08/19/measles-i... Also, measles didn't exactly return here, we had quite a few outbreaks even during the period where it was supposedly eliminated, there just wasn't evidence it was endemic to the UK during that time period.