Interactive: Every measles outbreak in the U.S. since 2009
Officials say California has had the worst measles outbreak in 15 years, after at least 70 people were confirmed to have been infected. Below is a map of measles infections in the U.S. since 2009, tracked by the Global Health Program at the Council on Foreign Relations.
Key 100+ cases
99 to 30
29 to 10
9 to 1
Note: As of Jan. 22, 2015; source: Council on Foreign Relations
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