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Some patients could be living with the aftereffects for years to come. Recent research into another persistent, mysterious disease might help us understand how to treat them. Read article here.

any Covid-19 patients may be dying from their immune response to the virus, not from the virus itself. Can science figure out how to save them? Read article here.

One day in February 2009, a 13-year-old boy named Sasha Egger started thinking that people were coming to hurt his family. His mother, Helen, watched with mounting panic that evening as her previously healthy son forgot the rules to Uno, his favorite card game, while playing it. She began making frantic phone calls the next morning. By then, Sasha was shuffling aimlessly around the yard, shredding paper and stuffing

I have a piece in the NYT Mag on the community of people who self-treat with parasites. They operate almost entirely outside of any regulatory or medical oversight. This is a story about desperate people trying to cure themselves with an unproven therapy. It’s not a story about whether the therapy works. We don’t know if it does. And in fact, there’s good evidence, in the form of double-blinded placebo-controlled stu

IN the last half-century, the prevalence of autoimmune disease — disorders in which the immune system attacks healthy tissue in the body — has increased sharply in the developed world. An estimated one in 13 Americans has one of these often debilitating, generally lifelong conditions. Many, like Type 1 diabetes and celiac disease, are linked with specific gene variants of the immune system, suggesting a strong geneti

For the microbiologist Justin Sonnenburg, that career-defining moment—the discovery that changed the trajectory of his research, inspiring him to study how diet and native microbes shape our risk for disease—came from a village in the African hinterlands. A group of Italian microbiologists had compared the intestinal microbes of young villagers in Burkina Faso with those of children in Florence, Italy. The villagers,

IN THE SUMMER OF 2010, Ben Blackwell, a five-year-old living near Dublin, Ireland, began complaining of headaches and a squealing noise in his head. And even though he’d stopped taking naps three years earlier, he now randomly fell asleep—while watching television, reading a book, sitting in the car. When Ben’s parents, James and Natalie, succeeded in rousing him, he often snarled at them and seemed terrified. But a