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The Trump administration took steps on Monday that appear likely to result in new tariffs on semiconductors and pharmaceutical products, adding to the levies President Trump has put on imports globally.Federal notices put online Monday afternoon said the administration had initiated national security investigations into imports of chips and pharmaceuticals. Mr. Trump has suggested that those investigations could result in tariffs.The investigations will also cover the machinery used to make semiconductors, products that contain chips and pharmaceutical ingredients.In a statement confirming the move, Kush Desai, a White House spokesman, said the president “has long been clear about the importance of reshoring manufacturing that is critical to our country’s national and economic security.”The new semiconductor and pharmaceutical tariffs would be issued under Section 232 of the Trade Expansion Act of 1962, which allows the president to impose tariffs to protect U.S. national security.Earlier in the day, Mr. Trump hinted that he would soon impose new tariffs on semiconductors and pharmaceuticals, as he looked to shore up more domestic production.We are having trouble retrieving the article content.Please enable JavaScript in your browser settings.Thank you for your patience while we verify access. If you are in Reader mode please exit and log into your Times account, or subscribe for all of The Times.Thank you for your patience while we verify access.Already a subscriber? Log in.Want all of The Times? Subscribe.

Users needing emergency care or hospitalization were at much greater risk of later dementia, researchers reported. That does not prove cannabis was the cause.Middle-aged and older adults who sought hospital or emergency room care because of cannabis use were almost twice as likely to develop dementia over the next five years, compared with similar people in the general population, a large Canadian study reported on Monday.When compared with adults who sought care for other reasons, the risk of developing dementia was still 23 percent higher among users of cannabis, the active ingredient in marijuana, the study also found.The study included the medical records of six million people in Ontario from 2008 to 2021. The authors accounted for health and sociodemographic differences between comparison groups, some of which play a role in cognitive decline.The data do not reveal how much cannabis the subjects had been using, and the study does not prove that regular or heavy cannabis use plays a causal role in dementia.But the finding does raise serious concerns that require further exploration, said Dr. Daniel T. Myran, the first author of the study, which was published in JAMA Neurology.“Figuring out whether or not cannabis use or heavy regular chronic use causes dementia is a challenging and complicated question that you don’t answer in one study,” said Dr. Myran, an assistant professor of family medicine at University of Ottawa.We are having trouble retrieving the article content.Please enable JavaScript in your browser settings.Thank you for your patience while we verify access. If you are in Reader mode please exit and log into your Times account, or subscribe for all of The Times.Thank you for your patience while we verify access.Already a subscriber? Log in.Want all of The Times? Subscribe.

14 minutes ago

Scientists developed a way to freeze a large mammal’s kidney, which could ease organ shortages in the future. First, they had to see if their method would work in a pig.On the last day of March, surgeons at Massachusetts General Hospital began an operation that they hoped might lead to a permanent change in how kidneys are transplanted in people.That morning’s patient was not a person. It was a pig, lying anesthetized on a table. The pig was missing one kidney and needed an implant.While kidneys typically must be transplanted within 24 to 36 hours, the kidney going into the pig had been removed 10 days before, frozen and then thawed early that morning.Never before had anyone transplanted a frozen organ into a large animal. There was so much that could go wrong.“I think there is about a 50 percent chance that it will work,” Korkut Uygun, a professor of surgery and a leader of the team, said before the surgery. Dr. Uygun is on the scientific advisory board of Sylvatica Biotech Inc., a company that is developing freezing methods to preserve organs.But the promise from freezing and storing organs is great.There is a severe and ongoing shortage of kidneys for transplants — more than 92,000 people are on waiting lists. One reason is that the window of 24 to 36 hours is so brief that it limits the number of recipients who are good matches.We are having trouble retrieving the article content.Please enable JavaScript in your browser settings.Thank you for your patience while we verify access. If you are in Reader mode please exit and log into your Times account, or subscribe for all of The Times.Thank you for your patience while we verify access.Already a subscriber? Log in.Want all of The Times? Subscribe.

Patients with advanced skin cancer could be fast-tracked to take part in a “revolutionary” trial of a new cancer vaccine.

Have We Been Thinking About A.D.H.D. All Wrong? With diagnoses at a record high, some experts have begun to question […]

The health secretary has chipped away at the idea that immunizing children against measles and other diseases is a public health good.During his Senate confirmation hearings to be health secretary, Robert F. Kennedy Jr. presented himself as a supporter of vaccines. But in office, he and the agencies he leads have taken far-reaching, sometimes subtle steps to undermine confidence in vaccine efficacy and safety, public health experts say.The National Institutes of Health halted funding for researchers who study vaccine hesitancy and hoped to find ways to overcome it. It also canceled programs intended to discover new vaccines to prevent future pandemics.The Centers for Disease Control and Prevention shelved an advertising campaign for the flu shot. Mr. Kennedy has said inaccurately that the scientists who advise the C.D.C. on vaccines have “severe, severe conflicts of interest” in promoting the products and cannot be trusted.The Health and Human Services Department cut billions of dollars to state health agencies, including funds needed to modernize state programs for childhood immunization. Mr. Kennedy said in a televised interview on Wednesday that he was unaware of this widely reported development.The Food and Drug Administration canceled an open meeting on flu vaccines with scientific advisers, later holding it behind closed doors. A top official paused the agency’s review of Novavax’s Covid vaccine. In a televised interview last week, Mr. Kennedy said falsely that similarly created vaccines don’t work against respiratory viruses.Some scientists said they saw a pattern: an effort to erode support for routine vaccination, and for the scientists who have long held it up as a public health goal.We are having trouble retrieving the article content.Please enable JavaScript in your browser settings.Thank you for your patience while we verify access. If you are in Reader mode please exit and log into your Times account, or subscribe for all of The Times.Thank you for your patience while we verify access.Already a subscriber? Log in.Want all of The Times? Subscribe.

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