Measles outbreak, AI in warfare, sped-up global warming

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  For Scientific American Science Quickly, I'm Kendra Pierre-Lewis, in for Rachel Feldman.

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  You're listening to our weekly science news roundup.

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  First, we have an update on measles cases in the United States.

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  South Carolina's measles outbreak grew to nearly a thousand cases last week,

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  according to data from the State Department of Health.

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  The outbreak, which began last October,

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  was part of a wave of measles outbreaks across the country that began in 2025.

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  According to the Centers for Disease Control and Prevention,

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  there were 50 reported measles outbreaks last year,

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  contributing to more than 2,200 confirmed cases and three deaths.

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  That was the largest number of confirmed measles cases

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  since the US was declared measles-free in 2000.

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  So far this year, there have been more than 1,100 confirmed cases according to the CDC.

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  The vast majority have been among unvaccinated people.

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  The surge in cases is pushing the US dangerously close to losing its measles-free status.

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  The country having measles-free or measles-elimination status doesn't mean that it has zero cases of measles,

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  but rather that it has not had continuous homegrown transmission of the virus lasting over 12 months.

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  Canada lost its elimination status in 2025.

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  Spain, Austria, Armenia, Azerbaijan, the UK,

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  and Uzbekistan all lost their measles-free status in January.

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