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If you’re a pregnant woman and have a backache or headache, or a fever, your options for over-the-counter treatment basically boil down to one medication: the pain reliever acetaminophen, better known as Tylenol. Doctors advise against using nonsteroidal anti-inflammatories, like ibuprofen and aspirin, during late pregnancy because they can compromise fetal circulation and have other adverse consequences. But evidenc

In recent decades, the prevalence of asthma and allergies has increased between two- and threefold in the United States. These days, one in 12 kids has asthma. More are allergic. The uptick is often said to have started in the late 20th century. But the first hint of a population-wide affliction — the sneezing masses — came earlier, in the late 19th century, among the American and British upper classes. Hay fever so

When Vik was in his late 20s, blood started appearing in his stool. He found himself rushing to the bathroom as many as nine times a day, and he quit his job at a software company. He received a diagnosis of severe ulcerative colitis, an inflammatory condition of the colon. Steroids, which suppress inflammation, didn’t work for him. Sulfasalazine suppositories offered only the slightest relief. A year and a half afte

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,

I have a piece in the NYT Sunday Review exploring the question: Should we bank our own stool for microbial reconstitution? A few notes and interesting tidbits that didn’t make it into the piece. First, an interesting study linking early-life microbial disturbances with the later development of asthma was just published in Science Translational Medicine. Unlike other studies, which look backward in time to make

Last year, asmy wife and I prepared for the arrival of our second child, I began to worry. My wife is a mid-level manager at an advertising agency with offices around the world. She heads a team, and she’s ferociously dedicated to her work—which translated, late in her pregnancy, to a couple of 80-hour weeks and chronic sleep deprivation. When she came home from work at 2 a.m. for the second time in as many weeks, I

Here’s an hour-long conversation with Russ Roberts over at EconTalk. Very gracious host. I love it that after reading Epidemic, people say, “I bet I had worms.”

Allergies are often seen as an accident. Your immune system misinterprets a harmless protein like dust or peanuts as a threat, and when you encounter it, you pay the price with sneezing, wheezing, and in the worst cases, death. What prompts some immune systems to err like this, while others never do? Some of the vulnerability is surely genetic. But comparative studies highlight the importance of environment, beginnin