Acute flaccid myelitis has left nearly 600 in the US - mostly children - with life-threatening paralysis. At last University of California, San Francisco, scientists found signs it's caused by enteroviruses.
A broader deal may be announced later in the day. The settlement involves large pharmaceutical distributors and Teva, resolving cases that sought redress from the devastation caused by two decades of opioid abuse.
A technology initially promoted to help cigarette smokers has transformed marijuana use, too. Now, with cases of severe lung illness rising, health investigators are warning people to stop vaping cannabis.
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