A federal judge in Texas has struck down the Affordable Care Act on the grounds that the individual mandate requiring people to buy health insurance is unconstitutional. Democrats are planning to appeal the ruling, which will likely end up before the Supreme Court. (New York Times)

Insurers are continuing expansions to sell ACA plans despite the ruling. Centene and Oscar Health, two of the biggest players in the Obamacare business, are operating as business as usual. Both companies said they are not reversing plans to enter new markets despite the ruling. (Forbes)

Amazon looked into buying a home health diagnostics startup and created a dedicated home health team. Amazon explored buying Confer Health, a startup that develops at-home health tests, before talks broke down. The company also had a team dedicated to home health tests in its moonshot group called “Grand Challenge.” A move into the home health testing space would pit Amazon against companies such as Quest and LabCorp. (CNBC)

Teen e-cigarette use doubled this year, according to a National Institute on Drug Abuse survey. Nearly 21% of high school seniors said they have used e-cigarettes in the past 30 days. The increase in vaping among 10th and 12th graders was the largest year-over-year jump for any substance measured by the survey. (Reuters)

Eli Lilly said its psoriatic arthritis drug, Taltz, outperformed Humira in a late-stage trial. It was the first trial of its kind to test a drug against Humira, which is the world’s best-selling prescription medicine. Humira is expected to come under even more pressure as biosimilars hit the market. (Reuters)