00:00A measles outbreak of historic proportions is spreading across the United States.
00:04Federal health authorities warn the worst may not yet have arrived.
00:08As of April 2026, the CDC has confirmed 1,171 measles cases across 33 jurisdictions.
00:17It is the largest outbreak seen in decades.
00:20States affected include California, Texas, Florida, New York, Ohio, and Illinois.
00:26Many other states are also reporting infections.
00:29The United States officially eliminated measles in the year 2000.
00:33That status is now in serious jeopardy.
00:37The outbreak is being driven mainly by declining vaccination rates.
00:41Experts warn that just a 1% drop in childhood MMR vaccination could cause 17,000 additional cases every year.
00:49Measles is one of the most contagious viruses known to science.
00:53If one person becomes infected, up to 9 out of 10 unprotected people nearby will catch it.
00:58The two-dose MMR vaccine remains highly effective.
01:01But it only works if people actually get it.
01:04Health officials are urging parents of unvaccinated children to act now.
01:08Not after the outbreak reaches their zip code.
01:111,671 cases.
01:1433 states.
01:1535 states.
01:15And the virus is still spreading.
01:17and the virus is still spreading.
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