Chelsea Alionar, a 37-year-old in Keizer, Ore., is going on more than 100 days of being sick, with a racing heart beat, chest pains and numbness.

Emily Jensen, a 34-year-old surfer and runner in Minneapolis, says she now needs an inhaler just to walk up the stairs.

And Annie Harris, a 22-year-old recent college graduate, is struggling with…

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