37 years ago, vaccines drove smallpox into extinction. Polio is about to be on death's doorstep. Now the U.K. can say it has added one more name to its personal kill list — measles.
The secret behind this achievement is something simple: vaccines and herd immunity.
It's important to note that, as the WHO defines it, "elimination" doesn't mean "completely wiped out." There were still about 1,600 cases in the United Kingdom last year.
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