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KingCounty.gov is an official government website. Here's how you knowexpand_moreexpand_less

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Official government websites use .gov

Website addresses ending in .gov belong to official government organizations in the United States.

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Secure .gov websites use HTTPS

A lock lock or https:// means you've safely connected to the .gov website. Only share sensitive information on official, secure websites.

What is evidence of immunity?

"Evidence of immunity" means that you can show you are protected from (immune to) a disease.

There are a few different ways to show evidence of immunity to measles:

  • A vaccine record.

  • A blood test showing you are immune. This is called a titer.

  • A laboratory record showing you had measles.

  • Birth before 1957.

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