Health

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FILE - In this April 10, 2018, file photo, a high school principal displays vaping devices that were confiscated from students in such places as restrooms or hallways at the school in Massachusetts. On Wednesday, April 3, 2019, the U.S. Food and Drug Administration said it has not established a direct connection between vaping and seizures but is seeking more information. Regulators noted that seizures and convulsions are a known side effect of nicotine poisoning. (AP Photo/Steven Senne, File)

Braden Scott gives a thumbs up as he pauses while practicing on the piano in Tomball, Texas on Friday, March 29, 2019. Braden was diagnosed with the mysterious syndrome called acute flaccid myelitis, or AFM, in 2016 and was paralyzed almost completely. But since then he has recovered much of his muscle function. His parents believe a lot of it has to do with thousands of hours of physical therapy. (AP Photo/David J. Phillip)

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FILE - In this Jan. 31, 2012 file photo, a farm worker carries heads of romaine lettuce in a field near Holtville, Calif. In a Nov. 15, 2018 email, James Gorny, a senior science adviser for produce safety at the FDA, wrote that growers “cannot cling to their generic E. coli monitoring standard,” which he called “unacceptable.” The message came five days before the FDA made public another outbreak linked to romaine lettuce, and after a separate outbreak earlier in the year sickened more than 200 and killed five. (AP Photo/Gregory Bull)

In this image made from video provided by Johns Hopkins Medicine, Nina Martinez of Atlanta is wheeled into a Baltimore operating room to become who is thought to be the world’s first kidney transplant living donor with HIV, on Monday, March 25, 2019. Martinez, 35, donated a kidney to an HIV-positive stranger, saying she "wanted to make a difference in somebody else's life" and counter the stigma that too often still surrounds HIV infection. (Johns Hopkins Medicine via AP)